rfc2629.xslt

<!--
    XSLT transformation from RFC2629 XML format to HTML

    Copyright (c) 2006-2017, Julian Reschke (julian.reschke@greenbytes.de)
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of Julian Reschke nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
-->

<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="2.0"

                xmlns:date="http://exslt.org/dates-and-times"
                xmlns:ed="http://greenbytes.de/2002/rfcedit"
                xmlns:exslt="http://exslt.org/common"
                xmlns:msxsl="urn:schemas-microsoft-com:xslt"
                xmlns:myns="mailto:julian.reschke@greenbytes.de?subject=rcf2629.xslt"
                xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
                xmlns:saxon="http://saxon.sf.net/"
                xmlns:saxon-old="http://icl.com/saxon"
                xmlns:svg="http://www.w3.org/2000/svg"
                xmlns:x="http://purl.org/net/xml2rfc/ext"
                xmlns:xi="http://www.w3.org/2001/XInclude"
                xmlns:xhtml="http://www.w3.org/1999/xhtml"

                exclude-result-prefixes="date ed exslt msxsl myns rdf saxon saxon-old svg x xi xhtml"
                >

<xsl:strip-space elements="abstract address author back figure front list middle note postal reference references rfc section table tbody thead tr texttable"/>

<xsl:output method="html" encoding="utf-8" doctype-system="about:legacy-compat" indent="no"/>

<!-- PIs outside the root element, or inside the root element but before <front> -->
<xsl:variable name="global-std-pis" select="/processing-instruction('rfc') | /*/processing-instruction('rfc')[following-sibling::front]"/>

<!-- rfc authorship PI -->

<xsl:param name="xml2rfc-authorship">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'authorship'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc comments PI -->

<xsl:param name="xml2rfc-comments">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'comments'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc compact PI -->

<xsl:param name="xml2rfc-compact">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'compact'"/>
    <xsl:with-param name="default" select="$xml2rfc-rfcedstyle"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc footer PI -->

<xsl:param name="xml2rfc-footer">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'footer'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc header PI -->

<xsl:param name="xml2rfc-header">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'header'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc inline PI -->

<xsl:param name="xml2rfc-inline">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'inline'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- include a table of contents if a processing instruction <?rfc?>
     exists with contents toc="yes". Can be overridden by an XSLT parameter -->

<xsl:param name="xml2rfc-toc">
  <xsl:variable name="default">
    <xsl:choose>
      <xsl:when test="/rfc/@version >= 3">yes</xsl:when>
      <xsl:otherwise>no</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="/rfc/@tocInclude='false'">no</xsl:when>
    <xsl:when test="/rfc/@tocInclude='true'">yes</xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$global-std-pis"/>
        <xsl:with-param name="attr" select="'toc'"/>
        <xsl:with-param name="default" select="$default"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<!-- optional tocdepth-->

<xsl:param name="xml2rfc-tocdepth">
  <xsl:choose>
    <xsl:when test="/rfc/@tocDepth">
      <xsl:value-of select="/rfc/@tocDepth"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$global-std-pis"/>
        <xsl:with-param name="attr" select="'tocdepth'"/>
        <xsl:with-param name="default" select="'3'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<xsl:variable name="parsedTocDepth">
  <xsl:choose>
    <xsl:when test="$xml2rfc-tocdepth='1'">1</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='2'">2</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='3'">3</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='4'">4</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='5'">5</xsl:when>
    <xsl:otherwise>99</xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<!-- suppress top block if a processing instruction <?rfc?>
     exists with contents tocblock="no". Can be overridden by an XSLT parameter -->

<xsl:param name="xml2rfc-topblock">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'topblock'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- Format to the RFC Editor's taste -->

<xsl:param name="xml2rfc-rfcedstyle">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'rfcedstyle'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- the name of an automatically inserted references section -->

<xsl:param name="xml2rfc-refparent">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'refparent'"/>
    <xsl:with-param name="default" select="'References'"/>
  </xsl:call-template>
</xsl:param>

<!-- use symbolic reference names instead of numeric ones unless a processing instruction <?rfc?>
     exists with contents symrefs="no". Can be overridden by an XSLT parameter -->

<xsl:param name="xml2rfc-symrefs">
  <xsl:choose>
    <xsl:when test="/rfc/@symRefs='false'">no</xsl:when>
    <xsl:when test="/rfc/@symRefs='true'">yes</xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$global-std-pis"/>
        <xsl:with-param name="attr" select="'symrefs'"/>
        <xsl:with-param name="default" select="'yes'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<!-- sort references if a processing instruction <?rfc?>
     exists with contents sortrefs="yes". Can be overridden by an XSLT parameter -->

<xsl:param name="xml2rfc-sortrefs">
  <xsl:choose>
    <xsl:when test="/rfc/@sortRefs='true'">yes</xsl:when>
    <xsl:when test="/rfc/@sortRefs='false'">no</xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$global-std-pis"/>
        <xsl:with-param name="attr" select="'sortrefs'"/>
        <xsl:with-param name="default" select="'no'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<!-- insert editing marks if a processing instruction <?rfc?>
     exists with contents editing="yes". Can be overridden by an XSLT parameter -->

<xsl:param name="xml2rfc-editing">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'editing'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- make it a private paper -->

<xsl:param name="xml2rfc-private">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'private'"/>
  </xsl:call-template>
</xsl:param>

<!-- background image? -->

<xsl:param name="xml2rfc-background">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'background'"/>
  </xsl:call-template>
</xsl:param>

<!-- CSS max page width -->

<xsl:param name="xml2rfc-ext-maxwidth">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'maxwidth'"/>
    <xsl:with-param name="default" select="'1000'"/>
  </xsl:call-template>
</xsl:param>

<xsl:variable name="parsedMaxwidth">
  <xsl:choose>
    <xsl:when test="string(number($xml2rfc-ext-maxwidth)) != 'NaN'">
      <xsl:value-of select="$xml2rfc-ext-maxwidth"/>
    </xsl:when>
    <xsl:when test="$xml2rfc-ext-maxwidth='none'"></xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="concat('Unsupported value of rfc-ext maxwidth PI: ', $xml2rfc-ext-maxwidth)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<!-- CSS styles -->

<xsl:param name="xml2rfc-ext-styles">fft-sans-serif ffb-serif ff-cleartype</xsl:param>

<xsl:variable name="styles" select="concat(' ',normalize-space($xml2rfc-ext-styles),' ')"/>

<xsl:param name="xml2rfc-ext-ff-body">
  <xsl:variable name="t">
    <xsl:if test="contains($styles,' ff-noto ')">
      <xsl:if test="contains($styles,' ffb-serif ')">
        'Noto Serif', 
      </xsl:if>
      <xsl:if test="contains($styles,' ffb-sans-serif ')">
        'Noto Sans',
      </xsl:if>
    </xsl:if>
    <xsl:if test="contains($styles,' ff-cleartype ')">
      <xsl:if test="contains($styles,' ffb-serif ')">
        cambria, georgia, 
      </xsl:if>
      <xsl:if test="contains($styles,' ffb-sans-serif ')">
        candara, calibri,
      </xsl:if>
    </xsl:if>
    <xsl:if test="contains($styles,' ffb-sans-serif ')">
      segoe, optima, arial, sans-serif,
    </xsl:if>
    serif
  </xsl:variable>
  <xsl:call-template name="ff-list">
    <xsl:with-param name="s" select="normalize-space($t)"/>
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-ff-title">
  <xsl:variable name="t">
    <xsl:if test="contains($styles,' ff-noto ')">
      <xsl:if test="contains($styles,' fft-serif ')">
        'Noto Serif', 
      </xsl:if>
      <xsl:if test="contains($styles,' fft-sans-serif ')">
        'Noto Sans',
      </xsl:if>
    </xsl:if>
    <xsl:if test="contains($styles,' ff-cleartype ')">
      <xsl:if test="contains($styles,' fft-serif ')">
        cambria, georgia, 
      </xsl:if>
      <xsl:if test="contains($styles,' fft-sans-serif ')">
        candara, calibri,
      </xsl:if>
    </xsl:if>
    <xsl:if test="contains($styles,' fft-serif ')">
      serif,
    </xsl:if>
    <xsl:if test="contains($styles,' fft-sans-serif ')">
      segoe, optima, arial,
    </xsl:if>
    sans-serif
  </xsl:variable>
  <xsl:call-template name="ff-list">
    <xsl:with-param name="s" select="normalize-space($t)"/>
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-ff-pre">
  <xsl:variable name="t">
    <xsl:if test="contains($styles,' ff-noto ')">
      'Roboto Mono',
    </xsl:if>
    <xsl:if test="contains($styles,' ff-cleartype ')">
      consolas, monaco,
    </xsl:if>
    monospace
  </xsl:variable>
  <xsl:call-template name="ff-list">
    <xsl:with-param name="s" select="normalize-space($t)"/>
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-webfonts">
  <xsl:if test="contains($styles,' ff-noto ')">
    <xsl:if test="contains($styles,' ffb-sans-serif ') or contains($styles,' fft-sans-serif ')">
      <xsl:text>@import url('https://fonts.googleapis.com/css?family=Noto+Sans:r,b,i,bi');&#10;</xsl:text>
    </xsl:if>
    <xsl:if test="contains($styles,' ffb-serif ') or contains($styles,' fft-serif ')">
      <xsl:text>@import url('https://fonts.googleapis.com/css?family=Noto+Serif:r,b,i,bi');&#10;</xsl:text>
    </xsl:if>
    <xsl:text>@import url('https://fonts.googleapis.com/css?family=Roboto+Mono:r,b,i,bi');&#10;</xsl:text>
  </xsl:if>
</xsl:param>

<xsl:template name="ff-list">
  <xsl:param name="s"/>
  <xsl:choose>
    <xsl:when test="not(contains($s,','))">
      <xsl:value-of select="normalize-space($s)"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="normalize-space(substring-before($s,','))"/>
      <xsl:text>, </xsl:text>
      <xsl:call-template name="ff-list">
        <xsl:with-param name="s" select="substring-after($s,',')"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- include PI -->

<xsl:template name="getIncludes">
  <xsl:param name="nodes"/>
  <xsl:for-each select="$nodes">
    <xsl:variable name="include">
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="."/>
        <xsl:with-param name="attr" select="'include'"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:variable name="doc">
      <xsl:choose>
        <xsl:when test="$include=''"/>
        <xsl:when test="substring($include, string-length($include) - 3) != '.xml'">
          <xsl:copy-of select="document(concat($include,'.xml'))"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:copy-of select="document($include)"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:if test="count(exslt:node-set($doc)) = 1">
      <myns:include from="{$include}" in="{generate-id(..)}">
        <xsl:copy-of select="$doc"/>
      </myns:include>
    </xsl:if>
  </xsl:for-each>
</xsl:template>

<xsl:template name="getXIncludes">
  <xsl:param name="nodes"/>
  <xsl:for-each select="$nodes">
    <xsl:choose>
      <xsl:when test="(@parse and @parse!='xml') or @xpointer">
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="'Unsupported attributes on x:include element'"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:variable name="doc">
          <xsl:copy-of select="document(@href)"/>
        </xsl:variable>
        <xsl:if test="count(exslt:node-set($doc)) = 1">
          <myns:include from="{@href}" in="{generate-id(..)}">
            <xsl:copy-of select="$doc"/>
          </myns:include>
        </xsl:if>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>

<xsl:variable name="includeDirectives">
  <xsl:call-template name="getIncludes">
    <xsl:with-param name="nodes" select="/rfc/back/references/processing-instruction('rfc')"/>
  </xsl:call-template>
  <xsl:call-template name="getXIncludes">
    <xsl:with-param name="nodes" select="/rfc/back/references/xi:include"/>
  </xsl:call-template>
</xsl:variable>

<!-- prettyprinting -->

<xsl:param name="xml2rfc-ext-html-pretty-print">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'html-pretty-print'"/>
  </xsl:call-template>
</xsl:param>

<xsl:variable name="prettyprint-class">
  <xsl:if test="$xml2rfc-ext-html-pretty-print">
    <xsl:value-of select="substring-before(normalize-space($xml2rfc-ext-html-pretty-print),' ')"/>
  </xsl:if>
</xsl:variable>

<xsl:variable name="prettyprint-script">
  <xsl:if test="$xml2rfc-ext-html-pretty-print">
    <xsl:value-of select="substring-after(normalize-space($xml2rfc-ext-html-pretty-print),' ')"/>
  </xsl:if>
</xsl:variable>

<!-- external resource containing errata, as generated by parse-errata.xslt -->
<xsl:param name="xml2rfc-ext-errata"/>
<xsl:variable name="errata-parsed" select="document($xml2rfc-ext-errata)//erratum[@status!='Rejected']"/>

<!-- "remove in RFC phrases" -->
<xsl:variable name="note-removeInRFC">This note is to be removed before publishing as an RFC.</xsl:variable>
<xsl:variable name="section-removeInRFC">This section is to be removed before publishing as an RFC.</xsl:variable>


<!-- CSS class name remapping -->

<xsl:param name="xml2rfc-ext-css-map"/>

<xsl:template name="generate-css-class">
  <xsl:param name="name"/>
  <xsl:variable name="cssmap" select="document($xml2rfc-ext-css-map)"/>
  <xsl:variable name="entry" select="$cssmap/*/map[@from=$name]"/>
  <xsl:choose>
    <xsl:when test="$entry">
      <xsl:value-of select="$entry/@css"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$name"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- WORK IN PROGRESS; ONLY A FEW CLASSES SUPPORTED FOR NOW -->
<xsl:variable name="css-artwork"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'artwork'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-art-svg"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'art-svg'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-docstatus"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'docstatus'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-center"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'center'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-erratum"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'erratum'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-error"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'error'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-fbbutton"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'fbbutton'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-feedback"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'feedback'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-header"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'header'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-left"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'left'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-noprint"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'noprint'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-publishedasrfc"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'publishedasrfc'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-reference"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'reference'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-right"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'right'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-tcenter"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'tcenter'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-tleft"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'tleft'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-tright"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'tright'"/></xsl:call-template></xsl:variable>
<xsl:variable name="css-tt"><xsl:call-template name="generate-css-class"><xsl:with-param name="name" select="'tt'"/></xsl:call-template></xsl:variable>


<!-- RFC-Editor site linking -->

<xsl:param name="xml2rfc-ext-link-rfc-to-info-page">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'link-rfc-to-info-page'"/>
    <xsl:with-param name="default">
      <xsl:choose>
        <xsl:when test="$pub-yearmonth >= 201503">yes</xsl:when>
        <xsl:otherwise>no</xsl:otherwise>
      </xsl:choose>
    </xsl:with-param>
  </xsl:call-template>
</xsl:param>

<!-- DOI insertion -->

<xsl:param name="xml2rfc-ext-insert-doi">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'insert-doi'"/>
    <xsl:with-param name="default">
      <xsl:choose>
        <xsl:when test="$pub-yearmonth >= 201505">yes</xsl:when>
        <xsl:otherwise>no</xsl:otherwise>
      </xsl:choose>
    </xsl:with-param>
  </xsl:call-template>
</xsl:param>

<!-- initials handling? -->

<xsl:param name="xml2rfc-multiple-initials">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'multiple-initials'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- paragraph links? -->

<xsl:param name="xml2rfc-ext-paragraph-links">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'paragraph-links'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for XML parsing in artwork -->

<xsl:param name="xml2rfc-ext-parse-xml-in-artwork">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'parse-xml-in-artwork'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-trace-parse-xml">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'trace-parse-xml'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for excluding the index -->

<xsl:param name="xml2rfc-ext-include-index">
  <xsl:choose>
    <xsl:when test="/rfc/@indexInclude='false'">no</xsl:when>
    <xsl:when test="/rfc/@indexInclude='true'">yes</xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
        <xsl:with-param name="attr" select="'include-index'"/>
        <xsl:with-param name="default" select="'yes'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<!-- extension for inserting RFC metadata -->

<xsl:param name="xml2rfc-ext-insert-metadata">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'insert-metadata'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for excluding DCMI properties in meta tag (RFC2731) -->

<xsl:param name="xml2rfc-ext-support-rfc2731">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'support-rfc2731'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for specifying the value for <vspace> after which it's taken as a page break -->

<xsl:param name="xml2rfc-ext-vspace-pagebreak">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'vspace-pagebreak'"/>
    <xsl:with-param name="default" select="'100'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for allowing markup inside artwork -->

<xsl:param name="xml2rfc-ext-allow-markup-in-artwork">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'allow-markup-in-artwork'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for including references into index -->

<xsl:param name="xml2rfc-ext-include-references-in-index">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'include-references-in-index'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- position of author's section -->

<xsl:param name="xml2rfc-ext-authors-section">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'authors-section'"/>
    <xsl:with-param name="default" select="'end'"/>
  </xsl:call-template>
</xsl:param>

<!-- justification? -->

<xsl:param name="xml2rfc-ext-justification">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'justification'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- switch for doublesided layout -->

<xsl:param name="xml2rfc-ext-duplex">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'duplex'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- trailing dots in section numbers -->

<xsl:param name="xml2rfc-ext-sec-no-trailing-dots">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'sec-no-trailing-dots'"/>
  </xsl:call-template>
</xsl:param>

<!-- check artwork width? -->

<xsl:param name="xml2rfc-ext-check-artwork-width">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'check-artwork-width'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- choose whether or not to do mailto links -->

<xsl:param name="xml2rfc-linkmailto">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'linkmailto'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- iprnotified switch -->

<xsl:param name="xml2rfc-iprnotified">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="$global-std-pis"/>
    <xsl:with-param name="attr" select="'iprnotified'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- URL templates for RFCs and Internet Drafts. -->

<!-- Reference the authoritative ASCII versions
<xsl:param name="rfcUrlPrefix" select="'http://www.ietf.org/rfc/rfc'" />
<xsl:param name="rfcUrlPostfix" select="'.txt'" />
-->
<!-- Reference the marked up versions over on https://tools.ietf.org/html. -->
<xsl:param name="rfcUrlFragSection" select="'section-'" />
<xsl:param name="rfcUrlFragAppendix" select="'appendix-'" />
<xsl:param name="internetDraftUrlFragSection" select="'section-'" />
<xsl:param name="internetDraftUrlFragAppendix" select="'appendix-'" />

<!--templates for URI calculation -->

<xsl:param name="xml2rfc-ext-isbn-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'isbn-uri'"/>
    <xsl:with-param name="default">https://www.worldcat.org/search?q=isbn:{isbn}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-isbn-uri">
  <xsl:param name="isbn"/>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$xml2rfc-ext-isbn-uri"/>
    <xsl:with-param name="replace" select="'{isbn}'"/>
    <xsl:with-param name="by" select="translate($isbn,'-','')"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-rfc-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'rfc-uri'"/>
    <xsl:with-param name="default">https://tools.ietf.org/html/rfc{rfc}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-rfc-uri">
  <xsl:param name="rfc"/>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$xml2rfc-ext-rfc-uri"/>
    <xsl:with-param name="replace" select="'{rfc}'"/>
    <xsl:with-param name="by" select="$rfc"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-internet-draft-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'internet-draft-uri'"/>
    <xsl:with-param name="default">https://tools.ietf.org/html/{internet-draft}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-internet-draft-uri">
  <xsl:param name="internet-draft"/>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$xml2rfc-ext-internet-draft-uri"/>
    <xsl:with-param name="replace" select="'{internet-draft}'"/>
    <xsl:with-param name="by" select="$internet-draft"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-doi-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'doi-uri'"/>
    <xsl:with-param name="default">http://dx.doi.org/{doi}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-doi-uri">
  <xsl:param name="doi"/>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$xml2rfc-ext-doi-uri"/>
    <xsl:with-param name="replace" select="'{doi}'"/>
    <xsl:with-param name="by" select="$doi"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-rfc-info-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'rfc-info-uri'"/>
    <xsl:with-param name="default">
      <xsl:choose>
        <xsl:when test="$pub-yearmonth &lt; 201708">http://www.rfc-editor.org/info/{type}{no}</xsl:when>
        <xsl:otherwise>https://www.rfc-editor.org/info/{type}{no}</xsl:otherwise>
      </xsl:choose>    
    </xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-rfc-info-uri">
  <xsl:param name="type"/>
  <xsl:param name="no"/>
  <xsl:variable name="t">
    <xsl:call-template name="replace-substring">
      <xsl:with-param name="string" select="$xml2rfc-ext-rfc-info-uri"/>
      <xsl:with-param name="replace" select="'{type}'"/>
      <xsl:with-param name="by" select="$type"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$t"/>
    <xsl:with-param name="replace" select="'{no}'"/>
    <xsl:with-param name="by" select="$no"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-rfc-erratum-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'rfc-erratum-uri'"/>
    <xsl:with-param name="default">https://www.rfc-editor.org/errata/eid{eid}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<xsl:template name="compute-rfc-erratum-uri">
  <xsl:param name="eid"/>
  <xsl:call-template name="replace-substring">
    <xsl:with-param name="string" select="$xml2rfc-ext-rfc-erratum-uri"/>
    <xsl:with-param name="replace" select="'{eid}'"/>
    <xsl:with-param name="by" select="$eid"/>
  </xsl:call-template>
</xsl:template>

<xsl:param name="xml2rfc-ext-rfc-errata-uri">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'rfc-errata-uri'"/>
    <xsl:with-param name="default">https://www.rfc-editor.org/errata_search.php?rfc={rfc}</xsl:with-param>
  </xsl:call-template>
</xsl:param>

<!-- the format we're producing -->
<xsl:param name="outputExtension" select="'html'"/>

<!-- source for autorefresh -->
<xsl:param name="xml2rfc-ext-refresh-from">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'refresh-from'"/>
    <xsl:with-param name="default" select="''"/>
  </xsl:call-template>
</xsl:param>

<!-- XSLT for autorefresh -->
<xsl:param name="xml2rfc-ext-refresh-xslt">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'refresh-xslt'"/>
    <xsl:with-param name="default" select="'rfc2629.xslt'"/>
  </xsl:call-template>
</xsl:param>

<!-- interval for autorefresh -->
<xsl:param name="xml2rfc-ext-refresh-interval">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'refresh-interval'"/>
    <xsl:with-param name="default" select="10"/>
  </xsl:call-template>
</xsl:param>

<!-- warning re: absent node-set ext. function -->
<xsl:variable name="node-set-warning">
  This stylesheet requires either an XSLT-1.0 processor with node-set()
  extension function, or an XSLT-2.0 processor. Therefore, parts of the
  document couldn't be displayed.
</xsl:variable>

<!-- character translation tables -->
<xsl:variable name="lcase" select="'abcdefghijklmnopqrstuvwxyz'" />
<xsl:variable name="ucase" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'" />
<xsl:variable name="digits" select="'0123456789'" />
<xsl:variable name="alpha" select="concat($lcase,$ucase)"/>
<xsl:variable name="alnum" select="concat($alpha,$digits)"/>

<!-- build help keys for indices -->
<xsl:key name="index-first-letter"
  match="iref|reference"
    use="translate(substring(concat(@anchor,@item),1,1),'abcdefghijklmnopqrstuvwxyz','ABCDEFGHIJKLMNOPQRSTUVWXYZ')" />

<xsl:key name="index-item"
  match="iref"
    use="@item" />

<xsl:key name="index-item-subitem"
  match="iref"
    use="concat(@item,'..',@subitem)" />

<xsl:key name="index-xref-by-sec"
  match="xref[@x:sec|@section]"
    use="concat(@target,'..',@x:sec,@section)" />

<xsl:key name="index-xref-by-anchor"
  match="xref[@x:rel|@relative]"
    use="concat(@target,'..',@x:rel,@relative)" />

<xsl:key name="anchor-item"
  match="//*[@anchor]"
    use="@anchor"/>

<xsl:key name="xref-item"
  match="//xref"
    use="@target"/>

<xsl:key name="extref-item"
  match="//x:ref"
    use="."/>

<!-- prefix for automatically generated anchors -->
<xsl:variable name="anchor-pref" select="'rfc.'" />

<!-- IPR version switch -->
<xsl:variable name="ipr-rfc3667" select="(
  /rfc/@number &gt; 3708) or
  not(
    (/rfc/@ipr = 'full2026') or
    (/rfc/@ipr = 'noDerivativeWorks2026') or
    (/rfc/@ipr = 'noDerivativeWorksNow') or
    (/rfc/@ipr = 'none') or
    (/rfc/@ipr = '') or
    not(/rfc/@ipr)
  )" />

<xsl:variable name="rfcno" select="/rfc/@number"/>

<xsl:variable name="submissionType">
  <xsl:choose>
    <xsl:when test="/rfc/@submissionType='IETF' or not(/rfc/@submissionType) or /rfc/submissionType=''">IETF</xsl:when>
    <xsl:when test="/rfc/@submissionType='IAB' or /rfc/@submissionType='IRTF' or /rfc/@submissionType='independent'">
      <xsl:value-of select="/rfc/@submissionType"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat('(UNSUPPORTED SUBMISSION TYPE: ',/rfc/@submissionType,')')"/>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported value for /rfc/@submissionType: ', /rfc/@submissionType)"/>
        <xsl:with-param name="inline" select="'no'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

  <!-- sanity check on @consensus -->
  <xsl:if test="/rfc/@consensus and /rfc/@submissionType='independent'">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg" select="concat('/rfc/@consensus meaningless with a /rfc/@submissionType value of ', /rfc/@submissionType)"/>
    </xsl:call-template>
  </xsl:if>
</xsl:variable>

<xsl:variable name="consensus">
  <xsl:choose>
    <xsl:when test="/rfc/@consensus='yes' or /rfc/@consensus='true' or not(/rfc/@consensus)">yes</xsl:when>
    <xsl:when test="/rfc/@consensus='no' or /rfc/@consensus='false'">no</xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat('(UNSUPPORTED VALUE FOR CONSENSUS: ',/rfc/@consensus,')')"/>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported value for /rfc/@consensus: ', /rfc/@consensus)"/>
        <xsl:with-param name="inline" select="'no'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<!-- Header format as defined in RFC 5741, and deployed end of Dec 2009 -->
<xsl:variable name="header-format">
  <xsl:choose>
    <xsl:when test="$pub-yearmonth >= 201001 or
      ($rfcno=5741 or $rfcno=5742 or $rfcno=5743)"
      >2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="rfc-boilerplate">
  <xsl:choose>
    <!-- RFC boilerplate as defined in RFC 5741, and deployed end of Dec 2009 -->
    <xsl:when test="$pub-yearmonth >= 201001 or
      ($rfcno=5741 or $rfcno=5742 or $rfcno=5743)"
      >2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<!-- use https in boilerplate links? -->
<xsl:variable name="rfc-boilerplate-use-https" select="($pub-yearmonth >= 201709 and $rfcno!=8230 and $rfcno!=8325 and $rfcno!=8236) or $rfcno=8214 or $rfcno=8223"/>

<xsl:variable name="rfc-info-link">
  <xsl:variable name="scheme">
    <xsl:choose>
      <xsl:when test="$rfc-boilerplate-use-https">https</xsl:when>
      <xsl:otherwise>http</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:value-of select="concat($scheme,'://www.rfc-editor.org/info/rfc',/rfc/@number)"/>
</xsl:variable>

<xsl:variable name="trust-license-info-link">
  <xsl:variable name="scheme">
    <xsl:choose>
      <xsl:when test="$rfc-boilerplate-use-https">https</xsl:when>
      <xsl:otherwise>http</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:value-of select="concat($scheme,'://trustee.ietf.org/license-info')"/>
</xsl:variable>

<!-- the reference to the latest and greatest headers-and-boilerplates document -->
<xsl:variable name="hab-reference">
  <xsl:choose>
    <xsl:when test="$pub-yearmonth >= 201606 or ($rfcno=7846 or $rfcno=7865 or $rfcno=7866 or $rfcno=7873 or $rfcno=7879 or $rfcno=7892)">Section 2 of RFC 7841</xsl:when>
    <xsl:otherwise>Section 2 of RFC 5741</xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="id-boilerplate">
  <xsl:choose>
    <!-- ID boilerplate approved by IESG on Jan 14 2010-->
    <xsl:when test="$pub-yearmonth >= 201004"
      >2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="ipr-rfc4748" select="(
  $ipr-rfc3667 and
    ( $rfcno &gt;= 4715 and ( $rfcno != 4718 and $rfcno != 4735 and $rfcno != 4749 ))
    or
    ( $rfcno=4578 or $rfcno=4582 or $rfcno=4583 or $rfcno=4628 or $rfcno=4629 or $rfcno=4639 or $rfcno=4651 or $rfcno=4682 or $rfcno=4684 or $rfcno=4695 or $rfcno=4696 )
    or
    ( not(/rfc/@number) and $pub-yearmonth >= 200611)
  )" />

<xsl:variable name="ipr-2007-08" select="(
  $ipr-rfc4748 and
    (
      ($rfcno &gt; 5000
        and $rfcno != 5020
        and $rfcno != 5021
        and $rfcno != 5034
        and $rfcno != 5052
        and $rfcno != 5065
        and $rfcno != 5094) or
      ($xml2rfc-ext-pub-year >= 2008) or
      (not(/rfc/@number) and $pub-yearmonth >= 200709)
    )
  )" />

<xsl:variable name="ipr-2008-11" select="(
    /rfc/@number and $pub-yearmonth >= 200811
  )
  or
  (
    /rfc/@ipr = 'trust200811' or
    /rfc/@ipr = 'noModificationTrust200811' or
    /rfc/@ipr = 'noDerivativesTrust200902' or
    /rfc/@ipr = 'trust200902' or
    /rfc/@ipr = 'noModificationTrust200902' or
    /rfc/@ipr = 'noDerivativesTrust200902' or
    /rfc/@ipr = 'pre5378Trust200902'
  )" />

<xsl:variable name="ipr-2009-02" select="(
    $ipr-2008-11 and $pub-yearmonth >= 200902
  )" />

<!-- this makes the Sep 2009 TLP text depend on the publication date to be >= 2009-11
     for IDs, and around 2009-09 for RFCs-->
<xsl:variable name="ipr-2009-09" select="(
    ( not(/rfc/@number) and $pub-yearmonth >= 200911 )
    or
    (
      /rfc/@number and $pub-yearmonth >= 200909 and
      $rfcno!=5582 and $rfcno!=5621 and $rfcno!=5632 and $rfcno!=5645 and $rfcno!=5646 and $rfcno!=5681
    )
  )" />

<!-- this makes the Jan 2010 TLP text depend on the publication date to be >= 2010-04
     for IDs, and around 2010-01 for RFCs-->
<xsl:variable name="ipr-2010-01" select="(
    ( not(/rfc/@number) and $pub-yearmonth >= 201004 )
    or
    (
      /rfc/@number and ($pub-yearmonth >= 201001 or
      $rfcno=5741 or $rfcno=5742 or $rfcno=5743)
    )
  )" />

<!-- see http://mailman.rfc-editor.org/pipermail/rfc-interest/2009-June/001373.html -->
<!-- for IDs, implement the change as 2009-11 -->
<xsl:variable name="abstract-first" select="(
    (/rfc/@number and $pub-yearmonth >= 200907)
    or
    (not(/rfc/@number) and $pub-yearmonth >= 200911)
  )" />

<!-- RFC 7322 changed the placement of notes -->
<xsl:variable name="notes-follow-abstract" select="(
    (/rfc/@number and /rfc/@number >= 7200)
    or
    ($pub-yearmonth >= 201409)
  )" />

<!-- funding switch -->
<xsl:variable name="funding0" select="(
  $rfcno &gt; 2499) or
  (not(/rfc/@number) and /rfc/@docName and $xml2rfc-ext-pub-year &gt;= 1999
  )" />

<xsl:variable name="funding1" select="(
  $rfcno &gt; 4320) or
  (not(/rfc/@number) and /rfc/@docName and $xml2rfc-ext-pub-year &gt;= 2006
  )" />

<xsl:variable name="no-funding" select="$ipr-2007-08"/>

<xsl:variable name="no-copylong" select="$ipr-2008-11"/>

<!-- will document have an index -->
<xsl:variable name="has-index" select="(//iref or (//xref and $xml2rfc-ext-include-references-in-index='yes')) and $xml2rfc-ext-include-index!='no'" />

<!-- does the document contain edits? -->
<xsl:variable name="has-edits" select="//ed:ins | //ed:del | //ed:replace" />

<!-- does the document have a published-as-rfc link? -->
<xsl:variable name="published-as-rfc" select="/*/x:link[@rel='Alternate' and starts-with(@title,'RFC')]"/>


<xsl:template match="text()[not(ancestor::artwork) and not(ancestor::sourcecode)]">
  <xsl:variable name="ws" select="'&#9;&#10;&#13;&#32;'"/>
  <xsl:variable name="starts-with-ws" select="'' = translate(substring(.,1,1),$ws,'')"/>
  <xsl:variable name="ends-with-ws" select="'' = translate(substring(.,string-length(.),1),$ws,'')"/>
  <xsl:variable name="normalized" select="normalize-space(.)"/>
  <!--<xsl:message> Orig: "<xsl:value-of select="."/>"</xsl:message>
  <xsl:message>Start: "<xsl:value-of select="$starts-with-ws"/>"</xsl:message>
  <xsl:message>  End: "<xsl:value-of select="$ends-with-ws"/>"</xsl:message> -->
  <xsl:if test="$starts-with-ws and (preceding-sibling::node() | parent::ed:ins | parent::ed:del)">
    <xsl:text> </xsl:text>
  </xsl:if>
  <xsl:value-of select="$normalized"/>
  <xsl:if test="$ends-with-ws and $normalized!='' and (following-sibling::node() | parent::ed:ins | parent::ed:del)">
    <xsl:text> </xsl:text>
  </xsl:if>
</xsl:template>


<xsl:template match="abstract">
  <xsl:call-template name="check-no-text-content"/>
  <section id="{$anchor-pref}abstract">
    <xsl:call-template name="insert-errata">
      <xsl:with-param name="section" select="'abstract'"/>
    </xsl:call-template>
    <h2><a href="#{$anchor-pref}abstract">Abstract</a></h2>
    <xsl:apply-templates />
  </section>
</xsl:template>

<msxsl:script language="JScript" implements-prefix="myns">
  function parseXml(str) {
    try {
      var doc = new ActiveXObject("MSXML2.DOMDocument");
      doc.async = false;
      if (doc.loadXML(str)) {
        return "";
      }
      else {
        return doc.parseError.reason + "\n" + doc.parseError.srcText + " (" + doc.parseError.line + "/" + doc.parseError.linepos + ")";
      }
    }
    catch(e) {
      return "";
    }
  }
</msxsl:script>

<xsl:template name="add-artwork-class">
  <xsl:variable name="v">
    <xsl:choose>
      <xsl:when test="@type='abnf' or @type='abnf2045' or @type='abnf2616' or @type='abnf7230' or @type='application/xml-dtd' or @type='inline' or @type='application/relax-ng-compact-syntax'">inline</xsl:when>
      <xsl:when test="starts-with(@type,'message/http') and contains(@type,'msgtype=&quot;request&quot;')">text2</xsl:when>
      <xsl:when test="starts-with(@type,'message/http')">text</xsl:when>
      <xsl:when test="@type='drawing' or @type='pdu'">drawing</xsl:when>
      <xsl:when test="@type='text/plain' or @type='example' or @type='code' or @type='application/xml-dtd' or @type='application/json'">text</xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
    <xsl:if test="@x:lang and $prettyprint-class!=''">
      <xsl:value-of select="concat(' ',$prettyprint-class)"/>
      <xsl:if test="@x:lang!=''">
        <xsl:value-of select="concat(' lang-',@x:lang)"/>
      </xsl:if>
    </xsl:if>
  </xsl:variable>
  <xsl:if test="normalize-space($v)!=''">
    <xsl:attribute name="class"><xsl:value-of select="normalize-space($v)"/></xsl:attribute>
  </xsl:if>
</xsl:template>

<xsl:template name="insert-begin-code">
  <xsl:if test="@x:is-code-component='yes'">
    <pre class="ccmarker cct"><span>&lt;CODE BEGINS></span></pre>
  </xsl:if>
</xsl:template>

<xsl:template name="insert-end-code">
  <xsl:if test="@x:is-code-component='yes'">
    <pre class="ccmarker ccb"><span>&lt;CODE ENDS></span></pre>
  </xsl:if>
</xsl:template>

<xsl:template match="artwork|sourcecode">
  <xsl:if test="not(ancestor::ed:del) and $xml2rfc-ext-parse-xml-in-artwork='yes' and function-available('myns:parseXml')" use-when="function-available('myns:parseXml')">
    <xsl:if test="contains(.,'&lt;?xml')">
      <xsl:variable name="body" select="substring-after(substring-after(.,'&lt;?xml'),'?>')" />
      <xsl:if test="$body!='' and myns:parseXml($body)!=''">
        <table style="background-color: red; border-width: thin; border-style: solid; border-color: black;">
        <tr><td>
        XML PARSE ERROR; parsed the body below:
        <pre>
        <xsl:value-of select="$body"/>
        </pre>
        resulting in:
        <pre>
        <xsl:value-of select="myns:parseXml($body)" />
        </pre>
        </td></tr></table>
      </xsl:if>
    </xsl:if>
    <xsl:if test="@ed:parse-xml-after">
      <xsl:if test="myns:parseXml(string(.))!=''">
        <table style="background-color: red; border-width: thin; border-style: solid; border-color: black;">
        <tr><td>
        XML PARSE ERROR:
        <pre><xsl:value-of select="myns:parseXml(string(.))" /></pre>
        </td></tr></table>
      </xsl:if>
    </xsl:if>
  </xsl:if>
  <xsl:if test="contains(.,'&#9;')">
    <xsl:call-template name="error">
      <xsl:with-param name="msg" select="'artwork contains HTAB character'"/>
      <xsl:with-param name="inline" select="'no'"/>
    </xsl:call-template>
  </xsl:if>
  <xsl:variable name="display">
    <xsl:choose>
      <xsl:when test="$xml2rfc-ext-allow-markup-in-artwork='yes'">
        <xsl:apply-templates/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="."/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="@align='right'">
      <div style="display:table; margin-left: auto; margin-right: 0em;">
        <xsl:call-template name="insert-begin-code"/>
        <pre style="margin-left: 0em;">
          <xsl:call-template name="add-artwork-class"/>
          <xsl:call-template name="insertInsDelClass"/>
          <xsl:copy-of select="$display"/>
        </pre>
        <xsl:call-template name="insert-end-code"/>
      </div>
    </xsl:when>
    <xsl:when test="@align='center'">
      <div style="display:table; margin-left: auto; margin-right: auto;">
        <xsl:call-template name="insert-begin-code"/>
        <pre style="margin-left: 0em;">
          <xsl:call-template name="add-artwork-class"/>
          <xsl:call-template name="insertInsDelClass"/>
          <xsl:copy-of select="$display"/>
        </pre>
        <xsl:call-template name="insert-end-code"/>
      </div>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="insert-begin-code"/>
      <pre>
        <xsl:call-template name="add-artwork-class"/>
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:copy-of select="$display"/>
      </pre>
      <xsl:call-template name="insert-end-code"/>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:call-template name="check-artwork-width">
    <xsl:with-param name="content"><xsl:apply-templates/></xsl:with-param>
    <xsl:with-param name="indent"><xsl:value-of select="string-length(@x:indent-with)"/></xsl:with-param>
  </xsl:call-template>
</xsl:template>

<!-- special case for first text node in artwork -->
<xsl:template match="artwork/text()[1]">
  <xsl:choose>
    <xsl:when test="starts-with(.,'&#10;')">
      <!-- reduce leading whitespace -->
      <xsl:value-of select="substring(.,2)"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="."/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>


<xsl:template name="check-artwork-width">
  <xsl:param name="content"/>
  <xsl:param name="indent"/>
  <xsl:choose>
    <xsl:when test="$xml2rfc-ext-check-artwork-width='no'">
      <!-- skip check -->
    </xsl:when>
    <xsl:when test="not(contains($content,'&#10;'))">
      <xsl:if test="string-length($content) > 69 + number($indent)">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">artwork line too long: '<xsl:value-of select="$content"/>' (<xsl:value-of select="string-length($content)"/> characters)</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="start" select="substring-before($content,'&#10;')"/>
      <xsl:variable name="end" select="substring-after($content,'&#10;')"/>
      <xsl:variable name="max">
        <xsl:choose>
          <xsl:when test="$indent!=''"><xsl:value-of select="69 + $indent"/></xsl:when>
          <xsl:otherwise>69</xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <xsl:if test="string-length($start) > $max">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">artwork line too long: '<xsl:value-of select="$start"/>' (<xsl:value-of select="string-length($start)"/> characters)</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:call-template name="check-artwork-width">
        <xsl:with-param name="content" select="$end"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="artwork[@src and starts-with(@type,'image/') or @type='svg']|artwork[svg:svg]">
  <xsl:variable name="class">
    <xsl:value-of select="$css-artwork"/>
    <xsl:text> </xsl:text>
    <xsl:if test="svg:svg">
      <xsl:value-of select="$css-art-svg"/>
    </xsl:if>
    <xsl:choose>
      <xsl:when test="@align='center'"><xsl:text> </xsl:text><xsl:value-of select="$css-center"/></xsl:when>
      <xsl:when test="@align='right'"><xsl:text> </xsl:text><xsl:value-of select="$css-right"/></xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
  </xsl:variable>
  <div class="{normalize-space($class)}">
    <xsl:choose>
      <xsl:when test="svg:svg">
        <xsl:copy-of select="svg:svg"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:variable name="alt">
          <xsl:choose>
            <xsl:when test="@alt!=''">
              <xsl:value-of select="@alt"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="."/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
        <img src="{@src}">
          <xsl:if test="normalize-space($alt)!=''">
            <xsl:attribute name="alt"><xsl:value-of select="$alt"/></xsl:attribute>
          </xsl:if>
          <xsl:if test="@width and @width!=''">
            <xsl:copy-of select="@width"/>
          </xsl:if>
          <xsl:if test="@height and @height!=''">
            <xsl:copy-of select="@height"/>
          </xsl:if>
        </img>
      </xsl:otherwise>
    </xsl:choose>
  </div>
</xsl:template>

<xsl:template match="author|x:contributor">
  <xsl:call-template name="check-no-text-content"/>

  <address>
    <xsl:call-template name="emit-author"/>

    <xsl:if test="@asciiFullname!='' or organization/@ascii!='' or postal/*/@ascii">
      <br/><br/>
      <em>Additional contact information:</em>
      <br/>
      <xsl:call-template name="emit-author">
        <xsl:with-param name="ascii" select="false()"/>
      </xsl:call-template>
    </xsl:if>
  </address>
</xsl:template>

<xsl:template name="emit-author">
  <xsl:param name="ascii" select="true()"/>
  <b>
    <xsl:choose>
      <xsl:when test="@asciiFullname!='' and $ascii">
        <xsl:value-of select="@asciiFullname" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="@fullname" />
      </xsl:otherwise>
    </xsl:choose>
  </b>
  <xsl:if test="@role">
    <xsl:text> (</xsl:text>
    <xsl:value-of select="@role" />
    <xsl:text>)</xsl:text>
  </xsl:if>
  <!-- annotation support for Martin "uuml" Duerst -->
  <xsl:if test="@x:annotation">
    <xsl:text> </xsl:text>
    <i><xsl:value-of select="@x:annotation"/></i>
  </xsl:if>

  <xsl:if test="normalize-space(concat(organization,organization/@ascii)) != ''">
    <br/>
    <xsl:choose>
      <xsl:when test="organization/@ascii!='' and $ascii">
        <xsl:value-of select="organization/@ascii" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="organization" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:if>

  <xsl:if test="address/postal">
    <xsl:for-each select="address/postal/street">
      <xsl:variable name="street">
        <xsl:call-template name="extract-normalized">
          <xsl:with-param name="name" select="'street'"/>
          <xsl:with-param name="ascii" select="$ascii"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:if test="$street!=''">
        <br/>
        <xsl:value-of select="$street"/>
      </xsl:if>
    </xsl:for-each>
    <xsl:for-each select="address/postal/postalLine">
      <xsl:variable name="line">
        <xsl:call-template name="extract-normalized">
          <xsl:with-param name="name" select="'postalLine'"/>
          <xsl:with-param name="ascii" select="$ascii"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:if test="$line!=''">
        <br/>
        <xsl:value-of select="$line"/>
      </xsl:if>
    </xsl:for-each>
    <xsl:if test="address/postal/city|address/postal/region|address/postal/code">
      <br/>
      <xsl:variable name="city">
        <xsl:if test="address/postal/city">
          <xsl:call-template name="extract-normalized">
            <xsl:with-param name="node" select="address/postal/city"/>
            <xsl:with-param name="name" select="'address/postal/city'"/>
            <xsl:with-param name="ascii" select="$ascii"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:variable>
      <xsl:variable name="region">
        <xsl:if test="address/postal/region">
          <xsl:call-template name="extract-normalized">
            <xsl:with-param name="node" select="address/postal/region"/>
            <xsl:with-param name="name" select="'address/postal/region'"/>
            <xsl:with-param name="ascii" select="$ascii"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:variable>
      <xsl:variable name="code">
        <xsl:if test="address/postal/code">
          <xsl:call-template name="extract-normalized">
            <xsl:with-param name="node" select="address/postal/code"/>
            <xsl:with-param name="name" select="'address/postal/code'"/>
            <xsl:with-param name="ascii" select="$ascii"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:variable>

      <xsl:if test="$city!=''">
        <xsl:value-of select="$city"/>
      </xsl:if>

      <xsl:variable name="region-and-code">
        <xsl:value-of select="$region"/>
        <xsl:if test="$region!='' and $code!=''">
          <xsl:text>&#160;</xsl:text>
        </xsl:if>
        <xsl:value-of select="$code"/>
      </xsl:variable>
      
      <xsl:if test="$region-and-code!=''">
        <xsl:if test="$city!=''">
          <xsl:text>, </xsl:text>
        </xsl:if>
        <xsl:value-of select="$region-and-code"/>
      </xsl:if>
    </xsl:if>
    <xsl:if test="address/postal/country">
      <xsl:variable name="country">
        <xsl:call-template name="extract-normalized">
          <xsl:with-param name="node" select="address/postal/country"/>
          <xsl:with-param name="name" select="'address/postal/country'"/>
          <xsl:with-param name="ascii" select="$ascii"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:if test="$country!=''">
        <br/>
        <xsl:value-of select="$country"/>
      </xsl:if>
    </xsl:if>
  </xsl:if>
  <xsl:if test="address/phone">
    <xsl:variable name="phone">
      <xsl:call-template name="extract-normalized">
        <xsl:with-param name="node" select="address/phone"/>
        <xsl:with-param name="name" select="'address/phone'"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:if test="$phone!=''">
      <br/>
      <xsl:text>Phone: </xsl:text>
      <a href="tel:{translate($phone,' ','')}"><xsl:value-of select="$phone" /></a>
    </xsl:if>
  </xsl:if>
  <xsl:if test="address/facsimile">
    <xsl:variable name="facsimile">
      <xsl:call-template name="extract-normalized">
        <xsl:with-param name="node" select="address/facsimile"/>
        <xsl:with-param name="name" select="'address/facsimile'"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:if test="$facsimile!=''">
      <br/>
      <xsl:text>Fax: </xsl:text>
      <a href="fax:{translate($facsimile,' ','')}"><xsl:value-of select="$facsimile" /></a>
    </xsl:if>
  </xsl:if>
  <xsl:for-each select="address/email">
    <xsl:variable name="email">
      <xsl:call-template name="extract-email"/>
    </xsl:variable>

    <br/>
    <xsl:choose>
      <xsl:when test="$xml2rfc-rfcedstyle='yes'">Email: </xsl:when>
      <xsl:otherwise>EMail: </xsl:otherwise>
    </xsl:choose>
    <xsl:choose>
      <xsl:when test="$xml2rfc-linkmailto!='no'">
        <a href="mailto:{$email}"><xsl:value-of select="$email" /></a>   
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$email" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
  <xsl:for-each select="address/uri">
    <xsl:variable name="uri">
      <xsl:call-template name="extract-uri"/>
    </xsl:variable>
    <xsl:if test="$uri!=''">
      <br/>
      <xsl:text>URI: </xsl:text>
      <a href="{$uri}"><xsl:value-of select="$uri" /></a>
      <xsl:if test="@x:annotation">
        <xsl:text> </xsl:text>
        <i><xsl:value-of select="@x:annotation"/></i>
      </xsl:if>
    </xsl:if>
  </xsl:for-each>
</xsl:template>

<!-- this is a named template because <back> may be absent -->
<xsl:template name="back">
  <xsl:call-template name="check-no-text-content"/>

  <!-- add editorial comments -->
  <xsl:if test="//cref and $xml2rfc-comments='yes' and $xml2rfc-inline!='yes'">
    <xsl:call-template name="insertComments" />
  </xsl:if>

  <!-- next, add information about the document's authors -->
  <xsl:if test="$xml2rfc-ext-authors-section='before-appendices'">
    <xsl:call-template name="insertAuthors" />
  </xsl:if>

  <!-- add all other top-level sections under <back> -->
  <xsl:apply-templates select="back/*[not(self::references) and not(self::ed:replace and .//references)]" />

  <!-- insert the index if index entries exist -->
  <!-- note it always comes before the authors section -->
  <xsl:if test="$has-index">
    <xsl:call-template name="insertIndex" />
  </xsl:if>

  <!-- Authors section is the absolute last thing, except for copyright stuff -->
  <xsl:if test="$xml2rfc-ext-authors-section='end'">
    <xsl:call-template name="insertAuthors" />
  </xsl:if>

  <xsl:if test="$xml2rfc-private=''">
    <!-- copyright statements -->
    <xsl:variable name="copyright">
      <xsl:call-template name="insertCopyright" />
    </xsl:variable>

    <!-- emit it -->
    <xsl:choose>
      <xsl:when test="function-available('exslt:node-set')">
        <xsl:apply-templates select="exslt:node-set($copyright)" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="$node-set-warning"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:if>

</xsl:template>

<xsl:template match="eref[node()]">
  <a href="{@target}"><xsl:apply-templates /></a>
</xsl:template>

<xsl:template match="eref[not(node())]">
  <xsl:text>&lt;</xsl:text>
  <a href="{@target}"><xsl:value-of select="@target" /></a>
  <xsl:text>&gt;</xsl:text>
</xsl:template>

<xsl:template match="figure">
  <xsl:call-template name="check-no-text-content"/>
  <!-- warn about the attributes that we do not support -->
  <xsl:for-each select="@*[local-name()!='title' and local-name()!='suppress-title' and local-name()!='anchor' and local-name()!='pn' and normalize-space(.)!='']">
    <xsl:if test="local-name(.)!='align' or normalize-space(.)!='left'">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="concat('unsupported attribute ',local-name(.),' on figure element')"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:for-each>
  <xsl:variable name="anch-container">
    <xsl:choose>
      <xsl:when test="ancestor::t">span</xsl:when>
      <xsl:otherwise>div</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:if test="@anchor!=''">
    <xsl:call-template name="check-anchor"/>
    <xsl:element name="{$anch-container}">
      <xsl:attribute name="id"><xsl:value-of select="@anchor"/></xsl:attribute>
    </xsl:element>
  </xsl:if>
  <xsl:variable name="anch">
    <xsl:call-template name="get-figure-anchor"/>
  </xsl:variable>
  <xsl:element name="{$anch-container}">
    <xsl:attribute name="id"><xsl:value-of select="$anch"/></xsl:attribute>
    <xsl:apply-templates select="*[not(self::name)]"/>
  </xsl:element>
  <xsl:if test="(@title!='' or name) or (@anchor!='' and not(@suppress-title='true'))">
    <xsl:variable name="n"><xsl:call-template name="get-figure-number"/></xsl:variable>
    <p class="figure">
      <xsl:if test="not(starts-with($n,'u'))">
        <xsl:text>Figure </xsl:text>
        <xsl:value-of select="$n"/>
        <xsl:if test="@title!='' or name">: </xsl:if>
      </xsl:if>
      <xsl:call-template name="insertTitle"/>
    </p>
  </xsl:if>
</xsl:template>

<xsl:variable name="all-notes" select="/rfc/front/note"/>
<xsl:variable name="all-edited-notes" select="/rfc/front/ed:replace[.//note]"/>
<xsl:variable name="notes-not-in-boilerplate" select="$all-notes[@title!='IESG Note' or $xml2rfc-private!='' or $notes-follow-abstract]"/>
<xsl:variable name="edited-notes-not-in-boilerplate" select="$all-edited-notes[.//note/@title!='IESG Note' or $xml2rfc-private!='' or $notes-follow-abstract]"/>
<xsl:variable name="notes-in-boilerplate" select="$all-notes[not(@title!='IESG Note' or $xml2rfc-private!='' or $notes-follow-abstract)]"/>
<xsl:variable name="edited-notes-in-boilerplate" select="$all-edited-notes[not(.//note/@title!='IESG Note' or $xml2rfc-private!='' or $notes-follow-abstract)]"/>

<xsl:template match="front">
  <xsl:call-template name="check-no-text-content"/>
  <header>
    <xsl:if test="$xml2rfc-topblock!='no'">
      <!-- collect information for left column -->
      <xsl:variable name="leftColumn">
        <xsl:call-template name="collectLeftHeaderColumn" />
      </xsl:variable>
      <!-- collect information for right column -->
      <xsl:variable name="rightColumn">
        <xsl:call-template name="collectRightHeaderColumn" />
      </xsl:variable>
      <!-- insert the collected information -->
      <table class="{$css-header}" id="{$anchor-pref}headerblock">
        <xsl:choose>
          <xsl:when test="function-available('exslt:node-set')">
            <xsl:call-template name="emitheader">
              <xsl:with-param name="lc" select="exslt:node-set($leftColumn)" />
              <xsl:with-param name="rc" select="exslt:node-set($rightColumn)" />
            </xsl:call-template>
          </xsl:when>
          <xsl:otherwise>
            <xsl:call-template name="error">
              <xsl:with-param name="msg" select="$node-set-warning"/>
            </xsl:call-template>
          </xsl:otherwise>
        </xsl:choose>
      </table>
    </xsl:if>

    <div id="{$anchor-pref}title">
      <!-- main title -->
      <h1><xsl:apply-templates select="title"/></h1>
      <xsl:if test="/rfc/@docName">
        <xsl:variable name="docname" select="/rfc/@docName"/>
        <xsl:choose>
          <xsl:when test="$rfcno!=''">
            <xsl:call-template name="warning">
              <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' is ignored because an RFC number is specified as well.</xsl:with-param>
            </xsl:call-template>
          </xsl:when>
          <xsl:otherwise>
            <div class="filename"><xsl:value-of select="$docname"/></div>
          </xsl:otherwise>
        </xsl:choose>
        
        <xsl:variable name="docname-noext">
          <xsl:choose>
            <xsl:when test="contains($docname,'.')">
              <xsl:call-template name="warning">
                <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' should contain the base name, not the filename (thus no file extension).</xsl:with-param>
              </xsl:call-template>
              <xsl:value-of select="substring-before($docname,'.')"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="$docname"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
  
        <!-- more name checks -->
        <xsl:variable name="offending" select="translate($docname,concat($lcase,$digits,'-.'),'')"/>
        <xsl:if test="$offending != ''">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' should not contain the character '<xsl:value-of select="substring($offending,1,1)"/>'.</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
  
        <xsl:if test="contains($docname,'--')">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' should not contain the character sequence '--'.</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
  
        <xsl:if test="not(starts-with($docname,'draft-'))">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' should start with 'draft-'.</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
  
        <!-- sequence number -->
        <xsl:variable name="seq">
          <xsl:choose>
            <xsl:when test="substring($docname-noext,string-length($docname-noext) + 1 - string-length('-latest'))='-latest'">latest</xsl:when>
            <xsl:when test="substring($docname-noext,string-length($docname-noext) - 2, 1)='-'"><xsl:value-of select="substring($docname-noext,string-length($docname-noext)-1)"/></xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
        </xsl:variable>
  
        <xsl:if test="$seq='' or ($seq!='latest' and translate($seq,$digits,'')!='')">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>' should end with a two-digit sequence number or 'latest'.</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
  
        <xsl:if test="string-length($docname)-string-length($seq) > 50">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">The @docName attribute '<xsl:value-of select="$docname"/>', excluding sequence number, should have less than 50 characters.</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
  
      </xsl:if>
    </div>
  </header>

  <!-- insert notice about update -->
  <xsl:if test="$published-as-rfc">
    <p class="{$css-publishedasrfc}">
      <b>Note:</b> a later version of this document has been published as <a href="{$published-as-rfc/@href}"><xsl:value-of select="$published-as-rfc/@title"/></a>.
    </p>
  </xsl:if>

  <!-- check for conforming ipr attribute -->
  <xsl:choose>
    <xsl:when test="not(/rfc/@ipr)">
      <xsl:if test="not(/rfc/@number) and $xml2rfc-private=''">
        <xsl:call-template name="error">
          <xsl:with-param name="msg">Either /rfc/@ipr or /rfc/@number is required</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:when test="/rfc/@ipr = 'full2026'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativeWorks'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativeWorksNow'" />
    <xsl:when test="/rfc/@ipr = 'none'" />
    <xsl:when test="/rfc/@ipr = 'full3667'" />
    <xsl:when test="/rfc/@ipr = 'noModification3667'" />
    <xsl:when test="/rfc/@ipr = 'noDerivatives3667'" />
    <xsl:when test="/rfc/@ipr = 'full3978'" />
    <xsl:when test="/rfc/@ipr = 'noModification3978'" />
    <xsl:when test="/rfc/@ipr = 'noDerivatives3978'" />
    <xsl:when test="/rfc/@ipr = 'trust200811'" />
    <xsl:when test="/rfc/@ipr = 'noModificationTrust200811'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativesTrust200811'" />
    <xsl:when test="/rfc/@ipr = 'trust200902'" />
    <xsl:when test="/rfc/@ipr = 'noModificationTrust200902'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativesTrust200902'" />
    <xsl:when test="/rfc/@ipr = 'pre5378Trust200902'" />
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unknown value for /rfc/@ipr: ', /rfc/@ipr)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

  <xsl:call-template name="insert-errata">
    <xsl:with-param name="section" select="'boilerplate'"/>
  </xsl:call-template>

  <xsl:if test="not($abstract-first)">
    <xsl:if test="$xml2rfc-private=''">
      <xsl:call-template name="emit-ietf-preamble">
        <xsl:with-param name="notes" select="$notes-in-boilerplate|$edited-notes-in-boilerplate"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
  
  <xsl:apply-templates select="abstract" />
  <xsl:if test="$notes-follow-abstract">
    <xsl:apply-templates select="$notes-not-in-boilerplate|$edited-notes-not-in-boilerplate" />
  </xsl:if>

  <xsl:if test="$abstract-first">
    <xsl:if test="$xml2rfc-private=''">
      <xsl:call-template name="emit-ietf-preamble">
        <xsl:with-param name="notes" select="$notes-in-boilerplate|$edited-notes-in-boilerplate"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>

  <xsl:if test="not($notes-follow-abstract)">
    <xsl:apply-templates select="$notes-not-in-boilerplate|$edited-notes-not-in-boilerplate" />
  </xsl:if>

  <xsl:if test="$xml2rfc-toc='yes'">
    <xsl:apply-templates select="/" mode="toc" />
    <xsl:call-template name="insertTocAppendix" />
  </xsl:if>

</xsl:template>

<xsl:template name="emit-ietf-preamble">
  <xsl:param name="notes"/>

  <!-- Get status info formatted as per RFC2629-->
  <xsl:variable name="preamble">
    <xsl:for-each select="/rfc">
      <xsl:call-template name="insertPreamble">
        <xsl:with-param name="notes" select="$notes"/>
      </xsl:call-template>
    </xsl:for-each>
  </xsl:variable>

  <!-- get document-supplied boilerplate -->
  <xsl:variable name="userboiler" select="/rfc/front/boilerplate"/>

  <!-- emit it -->
  <xsl:choose>
    <xsl:when test="function-available('exslt:node-set')">
      <xsl:variable name="differ" select="$userboiler and translate(normalize-space(string($userboiler)),' ','')!=translate(normalize-space(string($preamble)),' ','')"/>
      <!--<xsl:if test="$differ">
        <xsl:message>1: <xsl:value-of select="normalize-space(string($userboiler))"/></xsl:message>
        <xsl:message>2: <xsl:value-of select="normalize-space(string($preamble))"/></xsl:message>
      </xsl:if>-->
      <xsl:apply-templates select="exslt:node-set($preamble)" />
      <xsl:if test="$differ">
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="'user-supplied boilerplate differs from auto-generated boilerplate (inserting auto-generated)'"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="$node-set-warning"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="iref">
  <xsl:variable name="anchor"><xsl:call-template name="compute-iref-anchor"/></xsl:variable>
  <xsl:choose>
    <xsl:when test="parent::figure">
      <div id="{$anchor}"/>
    </xsl:when>
    <xsl:when test="ancestor::t or ancestor::artwork or ancestor::preamble or ancestor::postamble">
      <span id="{$anchor}"/>
    </xsl:when>
    <xsl:otherwise>
      <div id="{$anchor}"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="compute-iref-anchor">
  <xsl:variable name="first" select="translate(substring(@item,1,1),$ucase,$lcase)"/>
  <xsl:variable name="nkey" select="translate($first,$alnum,'')"/>
  <xsl:choose>
    <xsl:when test="count(.|$section-level-irefs)=count($section-level-irefs)">
      <xsl:for-each select="..">
        <xsl:value-of select="$anchor-pref"/>section.<xsl:call-template name="get-section-number"/>
      </xsl:for-each>
    </xsl:when>
    <xsl:when test="$nkey=''">
      <xsl:value-of select="$anchor-pref"/>iref.<xsl:value-of select="$first"/>.<xsl:number level="any" count="iref[starts-with(translate(@item,$ucase,$lcase),$first) and count(.|$section-level-irefs)!=count($section-level-irefs)]"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-pref"/>iref.<xsl:number level="any" count="iref[translate(substring(@item,1,1),$alnum,'')!='' and count(.|$section-level-irefs)!=count($section-level-irefs)]"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="compute-extref-anchor">
  <xsl:variable name="first" select="translate(substring(.,1,1),$ucase,$lcase)"/>
  <xsl:variable name="nkey" select="translate($first,$lcase,'')"/>
  <xsl:choose>
    <xsl:when test="$nkey=''">
      <xsl:value-of select="$anchor-pref"/>extref.<xsl:value-of select="$first"/>.<xsl:number level="any" count="x:ref[starts-with(translate(.,$ucase,$lcase),$first)]"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-pref"/>extref.<xsl:number level="any" count="x:ref[translate(substring(.,1,1),concat($lcase,$ucase),'')='']"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- list templates depend on the list style -->

<xsl:template name="list-empty">
  <ul class="empty">
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ul>
</xsl:template>

<xsl:template name="list-format">
  <dl>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dl>
</xsl:template>

<xsl:template name="list-hanging">
  <xsl:variable name="compact">
    <xsl:call-template name="get-compact-setting"/>
  </xsl:variable>
  <!-- insert a hard space for nested lists so that indentation works ok -->
  <xsl:if test="ancestor::list and normalize-space(preceding-sibling::text())=''">
    <xsl:text>&#160;</xsl:text>
  </xsl:if>
  <dl>
    <xsl:if test="$compact='yes'">
      <xsl:attribute name="class">compact</xsl:attribute>
    </xsl:if>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dl>
</xsl:template>

<xsl:template name="list-numbers">
  <ol>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>

<xsl:template name="check-no-hangindent">
  <xsl:if test="@hangIndent">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg" select="'hangIndent attribute not supported for this list style'"/>
    </xsl:call-template>
  </xsl:if>
</xsl:template>

<xsl:template name="list-letters">
  <xsl:variable name="style">
    <xsl:choose>
      <!-- lowercase for even-numbered nesting levels -->
      <xsl:when test="0=(count(ancestor::list[@style='letters']) mod 2)">la</xsl:when>
      <!-- uppercase otherwise -->
      <xsl:otherwise>ua</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <ol class="{$style}">
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>

<xsl:template name="list-symbols">
  <ul>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ul>
</xsl:template>

<xsl:template match="list">
  <xsl:variable name="style" select="ancestor-or-self::list[@style][1]/@style"/>
  <xsl:call-template name="check-no-text-content"/>
  <xsl:choose>
    <xsl:when test="not($style) or $style='empty'">
      <xsl:call-template name="check-no-hangindent"/>
      <xsl:call-template name="list-empty"/>
    </xsl:when>
    <xsl:when test="starts-with($style, 'format ')">
      <xsl:call-template name="list-format"/>
    </xsl:when>
    <xsl:when test="$style='hanging'">
      <xsl:call-template name="list-hanging"/>
    </xsl:when>
    <xsl:when test="$style='letters'">
      <xsl:call-template name="check-no-hangindent"/>
      <xsl:call-template name="list-letters"/>
    </xsl:when>
    <xsl:when test="$style='numbers'">
      <xsl:call-template name="check-no-hangindent"/>
      <xsl:call-template name="list-numbers"/>
    </xsl:when>
    <xsl:when test="$style='symbols'">
      <xsl:call-template name="check-no-hangindent"/>
      <xsl:call-template name="list-symbols"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported style attribute: ', $style)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>



<!-- v3 lists -->

<xsl:template match="ol[string-length(@type)>1]">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>
  <xsl:variable name="start">
    <xsl:choose>
      <xsl:when test="@group">
        <xsl:call-template name="ol-start">
          <xsl:with-param name="node" select="."/>
        </xsl:call-template>
      </xsl:when>
      <xsl:when test="@start">
        <xsl:value-of select="@start"/>
      </xsl:when>
      <xsl:otherwise>1</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="$p!='' and not(ancestor::list) and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <div id="{$anchor-pref}section.{$p}">
        <dl>
          <xsl:call-template name="copy-anchor"/>
          <xsl:for-each select="li">
            <xsl:variable name="label">
              <xsl:call-template name="expand-format-percent">
                <xsl:with-param name="format" select="../@type"/>
                <xsl:with-param name="pos" select="$start - 1 + position()"/>
              </xsl:call-template>
            </xsl:variable>
            <dt>
              <xsl:call-template name="copy-anchor"/>
              <xsl:value-of select="$label"/>
            </dt>
            <dd>
              <xsl:apply-templates/>
            </dd>
          </xsl:for-each>
        </dl>
      </div>
    </xsl:when>
    <xsl:otherwise>
      <dl>
        <xsl:call-template name="copy-anchor"/>
        <xsl:for-each select="li">
          <xsl:variable name="label">
            <xsl:call-template name="expand-format-percent">
              <xsl:with-param name="format" select="../@type"/>
              <xsl:with-param name="pos" select="$start - 1 + position()"/>
            </xsl:call-template>
          </xsl:variable>
          <dt>
            <xsl:call-template name="copy-anchor"/>
            <xsl:value-of select="$label"/>
          </dt>
          <dd>
            <xsl:apply-templates/>
          </dd>
        </xsl:for-each>
      </dl>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="dl">
  <xsl:variable name="hang" select="@hanging"/>
  <xsl:variable name="spac" select="@spacing"/>
  <xsl:variable name="class">
    <xsl:if test="$spac='compact'">compact </xsl:if>
    <xsl:if test="$hang='false'">nohang </xsl:if>
  </xsl:variable>
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>
  <div>
    <xsl:if test="$p!='' and not(ancestor::list) and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="concat($anchor-pref,'section.',$p)"/></xsl:attribute>
    </xsl:if>
    <dl>
      <xsl:call-template name="copy-anchor"/>
      <xsl:if test="normalize-space($class)!=''">
        <xsl:attribute name="class"><xsl:value-of select="normalize-space($class)"/></xsl:attribute>
      </xsl:if>
      <xsl:for-each select="dt">
        <xsl:apply-templates select="."/>
        <xsl:apply-templates select="following-sibling::dd[1]"/>
      </xsl:for-each>
    </dl>
  </div>
</xsl:template>

<xsl:template match="dt">
  <dt>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </dt>
</xsl:template>

<xsl:template match="dd">
  <dd>
    <xsl:variable name="block-level-children" select="t | dl"/>
    <xsl:choose>
      <xsl:when test="$block-level-children">
        <!-- TODO: improve error handling-->
        <xsl:for-each select="$block-level-children">
          <xsl:choose>
            <xsl:when test="self::t">
              <p>
                <xsl:call-template name="copy-anchor"/>
                <xsl:apply-templates/>
              </p>
            </xsl:when>
            <xsl:otherwise>
              <xsl:apply-templates select="."/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:for-each>
      </xsl:when>
      <xsl:otherwise>
        <xsl:apply-templates/>
      </xsl:otherwise>
    </xsl:choose>
  </dd>
</xsl:template>

<!-- get value of "compact" mode, checking subcompact first, then compact -->
<xsl:template name="get-compact-setting">
  <xsl:variable name="t1">
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="preceding::processing-instruction('rfc')"/>
      <xsl:with-param name="attr" select="'subcompact'"/>
      <xsl:with-param name="default" select="'?'"/>
      <xsl:with-param name="duplicate-warning" select="'no'"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="$t1='?'">
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="preceding::processing-instruction('rfc')"/>
        <xsl:with-param name="attr" select="'compact'"/>
        <xsl:with-param name="default" select="'?'"/>
        <xsl:with-param name="duplicate-warning" select="'no'"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$t1"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="ol-start">
  <xsl:param name="node"/>
  <xsl:variable name="group" select="$node/@group"/>
  <xsl:variable name="prec" select="$node/preceding::ol[@group=$group]"/>
  <xsl:choose>
    <xsl:when test="$node/@start">
      <xsl:value-of select="$node/@start"/>
    </xsl:when>
    <xsl:when test="$prec">
      <xsl:variable name="s">
        <xsl:call-template name="ol-start">
          <xsl:with-param name="node" select="$prec[last()]"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:value-of select="$s + count($prec[last()]/li)"/>
    </xsl:when>
    <xsl:otherwise>1</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="ol[not(@type) or string-length(@type)=1]">
  <xsl:call-template name="check-no-text-content"/>

  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>
  <xsl:variable name="start">
    <xsl:choose>
      <xsl:when test="@group">
        <xsl:call-template name="ol-start">
          <xsl:with-param name="node" select="."/>
        </xsl:call-template>
      </xsl:when>
      <xsl:when test="@start">
        <xsl:value-of select="@start"/>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
  </xsl:variable>
  <div>
    <xsl:if test="$p!='' and not(ancestor::list) and not(ancestor::ul) and not(ancestor::dl) and not(ancestor::ol) and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="concat($anchor-pref,'section.',$p)"/></xsl:attribute>
    </xsl:if>
    <ol>
      <xsl:if test="$start!=''">
        <xsl:attribute name="start"><xsl:value-of select="$start"/></xsl:attribute>
      </xsl:if>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:copy-of select="@type"/>
      <xsl:apply-templates />
    </ol>
  </div> 
</xsl:template>

<xsl:template match="ul">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>
  <div>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:if test="$p!='' and not(ancestor::list) and not(ancestor::ul) and not(ancestor::dl) and not(ancestor::ol) and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="concat($anchor-pref,'section.',$p)"/></xsl:attribute>
    </xsl:if>
    <ul>
      <xsl:call-template name="copy-anchor"/>
      <xsl:if test="@empty='true'">
        <xsl:attribute name="class">empty</xsl:attribute>
      </xsl:if>
      <xsl:apply-templates />
    </ul>
  </div>
</xsl:template>

<xsl:template match="li">
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
    <xsl:if test="not(following-sibling::li)">
      <xsl:variable name="l">
        <xsl:for-each select="..">
          <xsl:call-template name="get-paragraph-number"/>
        </xsl:for-each>
      </xsl:variable>
      <xsl:if test="$l!=''">
        <a class='self' href='#{$anchor-pref}section.{$l}'>&#xb6;</a>
      </xsl:if>
    </xsl:if>
  </li>
</xsl:template>

<!-- same for t(ext) elements -->

<xsl:template name="list-item-generic">
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:for-each select="../..">
      <xsl:call-template name="insert-issue-pointer"/>
    </xsl:for-each>
    <xsl:apply-templates />
  </li>
</xsl:template>

<xsl:template name="list-item-hanging">
  <xsl:if test="@hangText!=''">
    <dt>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:if test="count(preceding-sibling::t)=0">
        <xsl:variable name="del-node" select="ancestor::ed:del"/>
        <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
        <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
        <xsl:for-each select="../..">
          <xsl:call-template name="insert-issue-pointer">
            <xsl:with-param name="deleted-anchor" select="$deleted"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:if>
      <xsl:value-of select="@hangText" />
    </dt>
  </xsl:if>

  <xsl:variable name="dd-content">
    <xsl:apply-templates/>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="$dd-content!=''">
      <dd>
        <xsl:call-template name="insertInsDelClass"/>
        <!-- if hangIndent present, use 0.7 of the specified value (1em is the width of the "m" character -->
        <xsl:if test="../@hangIndent">
          <xsl:attribute name="style">margin-left: <xsl:value-of select="format-number(../@hangIndent * 0.7,'#.#')"/>em</xsl:attribute>
        </xsl:if>
        <xsl:apply-templates />
      </dd>
    </xsl:when>
    <xsl:otherwise>
      <dd>&#160;</dd>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="list-item-format">
  <xsl:variable name="list" select=".." />
  <xsl:variable name="format" select="substring-after(../@style,'format ')" />
  <xsl:variable name="pos">
    <xsl:choose>
      <xsl:when test="$list/@counter">
        <xsl:number level="any" count="list[@counter=$list/@counter or (not(@counter) and @style=concat('format ',$list/@counter))]/t" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:number level="any" count="list[concat('format ',@counter)=$list/@style or (not(@counter) and @style=$list/@style)]/t" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <dt>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="expand-format-percent">
      <xsl:with-param name="format" select="$format"/>
      <xsl:with-param name="pos" select="$pos"/>
    </xsl:call-template>
  </dt>
  <dd>
    <xsl:apply-templates/>
  </dd>
</xsl:template>

<xsl:template match="list/t | list/ed:replace/ed:*/t">
  <xsl:variable name="style" select="ancestor::list[@style][1]/@style"/>
  <xsl:choose>
    <xsl:when test="not($style) or $style='empty' or $style='letters' or $style='numbers' or $style='symbols'">
      <xsl:if test="@hangText">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg" select="'t/@hangText used on unstyled list'"/>
        </xsl:call-template>
      </xsl:if>
      <xsl:call-template name="list-item-generic"/>
    </xsl:when>
    <xsl:when test="starts-with($style, 'format ')">
      <xsl:call-template name="list-item-format"/>
    </xsl:when>
    <xsl:when test="$style='hanging'">
      <xsl:call-template name="list-item-hanging"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported style attribute: ', $style)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="list-lt-generic">
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="t" />
  </li>
</xsl:template>

<xsl:template name="list-lt-format">
  <xsl:variable name="list" select=".." />
  <xsl:variable name="format" select="substring-after(../@style,'format ')" />
  <xsl:variable name="pos">
    <xsl:choose>
      <xsl:when test="$list/@counter">
        <xsl:number level="any" count="list[@counter=$list/@counter or (not(@counter) and @style=concat('format ',$list/@counter))]/t" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:number level="any" count="list[concat('format ',@counter)=$list/@style or (not(@counter) and @style=$list/@style)]/t" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <dt>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="expand-format-percent">
      <xsl:with-param name="format" select="$format"/>
      <xsl:with-param name="pos" select="$pos"/>
    </xsl:call-template>
  </dt>
  <dd>
    <xsl:apply-templates select="t" />
  </dd>
</xsl:template>

<xsl:template name="list-lt-hanging">
  <xsl:if test="@hangText!=''">
    <dt>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:variable name="del-node" select="ancestor::ed:del"/>
      <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
      <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
      <xsl:for-each select="../..">
        <xsl:call-template name="insert-issue-pointer">
          <xsl:with-param name="deleted-anchor" select="$deleted"/>
        </xsl:call-template>
      </xsl:for-each>
      <xsl:value-of select="@hangText" />
    </dt>
  </xsl:if>
  <dd>
    <xsl:call-template name="insertInsDelClass"/>
    <!-- if hangIndent present, use 0.7 of the specified value (1em is the width of the "m" character -->
    <xsl:if test="../@hangIndent">
      <xsl:attribute name="style">margin-left: <xsl:value-of select="format-number(../@hangIndent * 0.7,'#.#')"/>em</xsl:attribute>
    </xsl:if>
    <xsl:apply-templates select="t" />
  </dd>
</xsl:template>

<xsl:template match="list/x:lt">
  <xsl:variable name="style" select="ancestor::list[@style][1]/@style"/>
  <xsl:choose>
    <xsl:when test="$style='letters' or $style='numbers' or $style='symbols'">
      <xsl:call-template name="list-lt-generic"/>
    </xsl:when>    
    <xsl:when test="starts-with($style, 'format ')">
      <xsl:call-template name="list-lt-format"/>
    </xsl:when>    
    <xsl:when test="$style='hanging'">
      <xsl:call-template name="list-lt-hanging"/>
    </xsl:when>    
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported style attribute: ', $style)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="expand-format-percent">
  <xsl:param name="format"/>
  <xsl:param name="pos"/>
  
  <xsl:choose>
    <xsl:when test="$format=''"><!-- done--></xsl:when>
    <xsl:when test="substring($format,1,1)!='%' or string-length($format)=1">
      <xsl:value-of select="substring($format,1,1)"/>
      <xsl:call-template name="expand-format-percent">
        <xsl:with-param name="format" select="substring($format,2)"/>
        <xsl:with-param name="pos" select="$pos"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="f" select="substring($format,2,1)"/>
      <xsl:choose>
        <xsl:when test="$f='%'">%</xsl:when>
        <xsl:when test="$f='c'"><xsl:number value="$pos" format="a"/></xsl:when>
        <xsl:when test="$f='C'"><xsl:number value="$pos" format="A"/></xsl:when>
        <xsl:when test="$f='d'"><xsl:number value="$pos"/></xsl:when>
        <xsl:when test="$f='i'"><xsl:number value="$pos" format="i"/></xsl:when>
        <xsl:when test="$f='I'"><xsl:number value="$pos" format="I"/></xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="concat('Unsupported % format: ', $f)"/>
            <xsl:with-param name="inline" select="'no'"/>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
      <xsl:call-template name="expand-format-percent">
        <xsl:with-param name="format" select="substring($format,3)"/>
        <xsl:with-param name="pos" select="$pos"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
  
</xsl:template>

<xsl:template match="middle">
  <xsl:apply-templates />
  <xsl:apply-templates select="../back//references"/>
</xsl:template>

<xsl:template match="note">
  <xsl:call-template name="check-no-text-content"/>
  <xsl:variable name="classes">
    <xsl:text>note</xsl:text>
    <xsl:text> </xsl:text>
    <xsl:if test="@removeInRFC='true'">rfcEditorRemove</xsl:if>
  </xsl:variable>
  <xsl:variable name="num"><xsl:number/></xsl:variable>
  <section id="{$anchor-pref}note.{$num}" class="{normalize-space($classes)}">
    <h2>
      <xsl:call-template name="insertInsDelClass"/>
      <a href="#{$anchor-pref}note.{$num}">
        <xsl:call-template name="insertTitle" />
      </a>
    </h2>
    <xsl:if test="@removeInRFC='true' and t[1]!=$note-removeInRFC">
      <xsl:variable name="t">
        <t><xsl:value-of select="$note-removeInRFC"/></t>
      </xsl:variable>
      <xsl:variable name="link" select="concat($anchor-pref,'note.',$num,'.p.1')"/>
      <div id="{$link}">
        <xsl:apply-templates mode="t-content" select="exslt:node-set($t)//text()">
          <xsl:with-param name="inherited-self-link" select="$link"/>
        </xsl:apply-templates>
      </div>
    </xsl:if>
    <xsl:apply-templates />
  </section>
</xsl:template>

<xsl:template match="postamble">
  <xsl:if test="normalize-space(.) != ''">
    <p>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:call-template name="editingMark" />
      <xsl:apply-templates />
    </p>
  </xsl:if>
</xsl:template>

<xsl:template match="preamble">
  <xsl:if test="normalize-space(.) != ''">
    <p>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:call-template name="editingMark" />
      <xsl:apply-templates />
    </p>
  </xsl:if>
</xsl:template>

<xsl:template name="computed-auto-target">
  <xsl:param name="bib"/>
  <xsl:param name="ref"/>

  <xsl:variable name="sec">
    <xsl:choose>
      <xsl:when test="$ref and starts-with($ref/@x:rel,'#') and not($ref/@x:sec) and not($ref/@section)">
        <xsl:variable name="extdoc" select="document($bib/x:source/@href)"/>
        <xsl:for-each select="$extdoc//*[@anchor=substring-after($ref/@x:rel,'#')]">
          <xsl:call-template name="get-section-number"/>
        </xsl:for-each>
      </xsl:when>
      <xsl:when test="$ref and $ref/@section">
        <xsl:value-of select="$ref/@section"/>
      </xsl:when>
      <xsl:when test="$ref">
        <xsl:value-of select="$ref/@x:sec"/>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="$ref and $bib/x:source/@href and $bib/x:source/@basename and $ref/@x:rel">
      <xsl:value-of select="concat($bib/x:source/@basename,'.',$outputExtension,$ref/@x:rel)" />
    </xsl:when>
    <xsl:when test="$ref and $bib/x:source/@href and $bib/x:source/@basename and $sec!=''">
      <xsl:value-of select="concat($bib/x:source/@basename,'.',$outputExtension,'#')" />
      <xsl:value-of select="$anchor-pref"/>section.<xsl:value-of select="$sec"/>
      <!-- sanity check on target document -->
      <xsl:variable name="d" select="document($bib/x:source/@href)"/>
      <xsl:variable name="sections">
        <xsl:text> </xsl:text>
        <xsl:apply-templates select="$d//rfc" mode="get-section-numbers"/>
        <xsl:text> </xsl:text>
      </xsl:variable>
      <xsl:if test="not(contains($sections,concat(' ',$sec,' ')))">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg" select="concat('apparently dangling reference to ',$sec,' of ',$bib/@anchor)"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:when test="$ref and $bib/x:source/@href and $bib/x:source/@basename and $ref/@anchor">
      <xsl:value-of select="concat($bib/x:source/@basename,'.',$outputExtension,'#',$ref/@anchor)" />
    </xsl:when>
    <!-- tools.ietf.org won't have the "-latest" draft -->
    <xsl:when test="$bib//seriesInfo/@name='Internet-Draft' and $bib/x:source/@href and $bib/x:source/@basename and substring($bib/x:source/@basename, (string-length($bib/x:source/@basename) - string-length('-latest')) + 1)='-latest'">
      <xsl:value-of select="concat($bib/x:source/@basename,'.',$outputExtension)" />
    </xsl:when>
    <!-- TODO: this should handle the case where there's one BCP entry but
    multiple RFC entries in a more useful way-->
    <xsl:when test="$bib//seriesInfo/@name='RFC'">
      <xsl:variable name="rfcEntries" select="$bib//seriesInfo[@name='RFC']"/>
      <xsl:if test="count($rfcEntries)!=1">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg" select="concat('seriesInfo/@name=RFC encountered multiple times for reference ',$bib/@anchor,', will generate link to first entry only')"/>
        </xsl:call-template>
      </xsl:if>
      <xsl:call-template name="compute-rfc-uri">
        <xsl:with-param name="rfc" select="$rfcEntries[1]/@value"/>
      </xsl:call-template>
      <xsl:if test="$ref and $sec!='' and $rfcUrlFragSection and $rfcUrlFragAppendix">
        <xsl:choose>
          <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">
            <xsl:value-of select="concat('#',$rfcUrlFragAppendix,$sec)"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="concat('#',$rfcUrlFragSection,$sec)"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
    </xsl:when>
    <xsl:when test="$bib//seriesInfo/@name='Internet-Draft'">
      <xsl:variable name="draftName" select="$bib//seriesInfo[@name='Internet-Draft']/@value"/>
      <xsl:variable name="endsWithLatest" select="substring($draftName, string-length($draftName) - string-length('-latest') + 1) = '-latest'"/>
      <xsl:if test="not($endsWithLatest)">
        <xsl:call-template name="compute-internet-draft-uri">
          <xsl:with-param name="internet-draft" select="$draftName"/>
        </xsl:call-template>
        <xsl:if test="$ref and $sec!='' and $internetDraftUrlFragSection and $internetDraftUrlFragAppendix">
          <xsl:choose>
            <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">
              <xsl:value-of select="concat('#',$internetDraftUrlFragAppendix,$sec)"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="concat('#',$internetDraftUrlFragSection,$sec)"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:if>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise />
  </xsl:choose>
</xsl:template>

<!-- generates a string with white-space separated section numbers -->
<xsl:template match="node()|@*" mode="get-section-numbers">
  <xsl:apply-templates select="*" mode="get-section-numbers"/>
</xsl:template>
<xsl:template match="section|references|appendix" mode="get-section-numbers">
  <xsl:call-template name="get-section-number"/>
  <xsl:text> </xsl:text>
  <xsl:apply-templates select="*" mode="get-section-numbers"/>
</xsl:template>

<xsl:template name="compute-section-number">
  <xsl:param name="bib"/>
  <xsl:param name="ref"/>
  
  <xsl:variable name="anch" select="substring-after($ref/@x:rel,'#')"/>
  
  <xsl:choose>
    <xsl:when test="$anch=''">
      <xsl:call-template name="error">
        <xsl:with-param name="msg">Not a fragment identifier: <xsl:value-of select="$ref/@x:rel"/></xsl:with-param>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="extdoc" select="document($bib/x:source/@href)"/>
      <xsl:variable name="nodes" select="$extdoc//*[@anchor=$anch]"/>
      <xsl:if test="not($nodes)">
        <xsl:call-template name="error">
          <xsl:with-param name="msg">Anchor '<xsl:value-of select="$anch"/>' in <xsl:value-of select="$bib/@anchor"/> not found in source file '<xsl:value-of select="$bib/x:source/@href"/>'.</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:for-each select="$nodes">
        <xsl:call-template name="get-section-number"/>
      </xsl:for-each>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="computed-target">
  <xsl:param name="bib"/>
  <xsl:param name="ref"/>

  <xsl:variable name="bibtarget">
    <xsl:choose>
      <xsl:when test="starts-with($bib/@target,'http://www.rfc-editor.org/info/rfc') or starts-with($bib/@target,'https://www.rfc-editor.org/info/rfc') and $ref and ($ref/@x:sec or $ref/@x:rel or $ref/@section or $ref/@relative)">
        <!--ignored, use tools.ietf.org link instead -->
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$bib/@target"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:choose>
    <xsl:when test="$bibtarget!=''">
      <xsl:if test="$ref and $ref/@x:sec">
        <xsl:choose>
          <xsl:when test="$ref/@x:rel">
            <xsl:value-of select="concat($bib/@target,$ref/@x:rel)"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:call-template name="warning">
              <xsl:with-param name="msg">Can't generate section link for to <xsl:value-of select="$bib/@anchor"/>; no @x:rel specified</xsl:with-param>
            </xsl:call-template>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
      <xsl:if test="$ref and $ref/@section">
        <xsl:choose>
          <xsl:when test="$ref/@relative">
            <xsl:value-of select="concat($bib/@target,$ref/@relative)"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:call-template name="warning">
              <xsl:with-param name="msg">Can't generate section link for to <xsl:value-of select="$bib/@anchor"/>; no @relative specified</xsl:with-param>
            </xsl:call-template>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="computed-auto-target">
        <xsl:with-param name="bib" select="$bib"/>
        <xsl:with-param name="ref" select="$ref"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="compute-doi">
  <xsl:choose>
    <!-- xref seems to be for BCP, not RFC -->
    <xsl:when test=".//seriesInfo[@name='BCP'] and starts-with(@anchor, 'BCP')" />
    <xsl:when test=".//seriesInfo[@name='RFC'] and not(.//organization='RFC Errata') and not(@target='http://www.rfc-editor.org' or @target='https://www.rfc-editor.org')">
      <xsl:variable name="rfc" select=".//seriesInfo[@name='RFC'][1]/@value"/>
      <xsl:value-of select="concat('10.17487/RFC', format-number($rfc,'#0000'))"/>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:template>

<!-- processed elsewhere -->
<xsl:template match="displayreference">
  <xsl:variable name="t" select="@to"/>
  <xsl:if test="//reference/@anchor=$t or count(//displayreference[@to=$t])!=1">
    <xsl:call-template name="error">
      <xsl:with-param name="msg">displayreference <xsl:value-of select="$t"/> will create non-unique reference name.</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
</xsl:template>

<xsl:template name="displayname-for-author">
  <xsl:param name="not-reversed"/>

  <xsl:variable name="initials">
    <xsl:call-template name="format-initials"/>
  </xsl:variable>
  <xsl:variable name="truncated-initials">
    <xsl:call-template name="truncate-initials">
      <xsl:with-param name="initials" select="$initials"/>
    </xsl:call-template>
  </xsl:variable>

  <!-- surname/initials is reversed for last author except when it's the only one -->
  <xsl:choose>
    <xsl:when test="$truncated-initials='' and @surname">
      <xsl:value-of select="@surname"/>
    </xsl:when>
    <xsl:when test="position()=last() and position()!=1">
      <xsl:value-of select="concat($truncated-initials,' ',@surname)" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat(@surname,', ',$truncated-initials)" />
    </xsl:otherwise>
  </xsl:choose>
  <xsl:if test="@asciiSurname!='' or @asciiInitials!=''">
    <xsl:text> (</xsl:text>
    <xsl:variable name="i">
      <xsl:choose>
        <xsl:when test="@asciiInitials!=''">
          <xsl:value-of select="@asciiInitials"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="$truncated-initials"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:variable name="s">
      <xsl:choose>
        <xsl:when test="@asciiSurname!=''">
          <xsl:value-of select="@asciiSurname"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="@surname"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:choose>
      <xsl:when test="$i=''">
        <xsl:value-of select="$s"/>
      </xsl:when>
      <xsl:when test="$not-reversed">
        <xsl:value-of select="concat($i,' ',$s)" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="concat($s,', ',$i)" />
      </xsl:otherwise>
    </xsl:choose>
    <xsl:text>)</xsl:text>
  </xsl:if> 
  <xsl:if test="@role='editor'">
    <xsl:text>, Ed.</xsl:text>
  </xsl:if>
</xsl:template>

<xsl:template name="link-ref-title-to">
  <xsl:choose>
    <xsl:when test="starts-with(@target,'http://www.rfc-editor.org/info/rfc') or starts-with(@target,'https://www.rfc-editor.org/info/rfc')">
      <xsl:call-template name="info">
        <xsl:with-param name="msg">Ignoring @target <xsl:value-of select="@target"/> in link calculation</xsl:with-param>
      </xsl:call-template>
      <xsl:call-template name="computed-auto-target">
        <xsl:with-param name="bib" select="."/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test=".//seriesInfo/@name='RFC' and (@target='http://www.rfc-editor.org' or @target='https://www.rfc-editor.org') and starts-with(front/title,'Errata ID ') and front/author/organization='RFC Errata'">
      <!-- check for erratum link -->
      <xsl:variable name="eid" select="normalize-space(substring(front/title,string-length('Errata ID ')))"/>
      <xsl:call-template name="compute-rfc-erratum-uri">
        <xsl:with-param name="eid" select="$eid"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="@target">
      <xsl:if test="normalize-space(@target)=''">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">invalid (empty) target attribute in reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:value-of select="normalize-space(@target)" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="computed-auto-target">
        <xsl:with-param name="bib" select="."/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="reference">
  <xsl:call-template name="check-no-text-content"/>

  <!-- check for reference to reference -->
  <xsl:variable name="anchor" select="@anchor"/>
  <xsl:choose>
    <xsl:when test="not(@anchor)">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">missing anchor on reference: <xsl:value-of select="."/></xsl:with-param>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="not(ancestor::ed:del) and (ancestor::rfc and not(key('xref-item',$anchor)))">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">unused reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="not(ancestor::ed:del) and (not(ancestor::rfc) and not($src//xref[@target=$anchor]))">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">unused (included) reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>

  <!-- check normative/informative -->
  <xsl:variable name="t-r-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
  <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
  <xsl:if test="$r-is-normative and not(ancestor::ed:del)">
    <xsl:variable name="tst">
      <xsl:for-each select="key('xref-item',$anchor)">
        <xsl:variable name="t-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
        <xsl:if test="$is-normative">OK</xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:if test="$tst=''">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">all references to the normative reference '<xsl:value-of select="@anchor"/>' appear to be informative</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>

  <xsl:call-template name="check-anchor"/>

  <xsl:variable name="target">
    <xsl:call-template name="link-ref-title-to"/>
  </xsl:variable>

  <dt id="{@anchor}">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:variable name="del-node" select="ancestor::ed:del"/>
    <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
    <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
    <xsl:for-each select="../..">
      <xsl:call-template name="insert-issue-pointer">
        <xsl:with-param name="deleted-anchor" select="$deleted"/>
      </xsl:call-template>
    </xsl:for-each>
    <xsl:call-template name="reference-name"/>
  </dt>

  <dd>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:for-each select="front/author">
      <xsl:choose>
        <xsl:when test="@surname and @surname!=''">
          <xsl:variable name="displayname">
            <xsl:call-template name="displayname-for-author">
              <xsl:with-param name="not-reversed" select="position()=last() and position()!=1"/>
            </xsl:call-template>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="address/email and $xml2rfc-linkmailto!='no'">
              <a href="mailto:{address/email}"><xsl:value-of select="$displayname" /></a>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="$displayname" />
            </xsl:otherwise>
          </xsl:choose>

          <xsl:choose>
            <xsl:when test="position()=last() - 1">
              <xsl:if test="last() &gt; 2">,</xsl:if>
              <xsl:text> and </xsl:text>
            </xsl:when>
            <xsl:otherwise>
              <xsl:text>, </xsl:text>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:when test="organization/text()">
          <xsl:choose>
            <xsl:when test="address/uri">
              <a href="{address/uri}"><xsl:value-of select="organization" /></a>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="organization" />
            </xsl:otherwise>
          </xsl:choose>
          <xsl:if test="organization/@ascii">
            <xsl:value-of select="concat(' (',normalize-space(organization/@ascii),')')"/>
          </xsl:if>
          <xsl:choose>
            <xsl:when test="position()=last() - 1">
              <xsl:if test="last() &gt; 2">,</xsl:if>
              <xsl:text> and </xsl:text>
            </xsl:when>
            <xsl:otherwise>
              <xsl:text>, </xsl:text>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:otherwise />
      </xsl:choose>
    </xsl:for-each>

    <xsl:variable name="quoted" select="not(front/title/@x:quotes='false') and not(@quoteTitle='false')"/>
    <xsl:if test="$quoted">&#8220;</xsl:if>
    <xsl:choose>
      <xsl:when test="string-length($target) &gt; 0">
        <a href="{$target}"><xsl:value-of select="normalize-space(front/title)" /></a>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="normalize-space(front/title)" />
      </xsl:otherwise>
    </xsl:choose>
    <xsl:if test="$quoted">&#8221;</xsl:if>

    <xsl:if test="front/title/@ascii!=''">
      <xsl:text> (</xsl:text>
      <xsl:if test="$quoted">&#8220;</xsl:if>
      <xsl:value-of select="normalize-space(front/title/@ascii)" />
      <xsl:if test="$quoted">&#8221;</xsl:if>
      <xsl:text>)</xsl:text>
    </xsl:if> 

    <xsl:variable name="si" select="seriesInfo|front/seriesInfo"/>
    <xsl:if test="seriesInfo and front/seriesInfo">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">seriesInfo present both on reference and reference/front</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
    
    <xsl:variable name="rfcs" select="count($si[@name='RFC'])"/>

    <xsl:variable name="doi">
      <xsl:call-template name="compute-doi"/>
    </xsl:variable>

    <xsl:for-each select="$si">
      <xsl:text>, </xsl:text>
      <xsl:choose>
        <xsl:when test="not(@name) and not(@value) and ./text()"><xsl:value-of select="." /></xsl:when>
        <xsl:when test="@name='RFC' and $rfcs > 1">
          <xsl:variable name="uri">
            <xsl:call-template name="compute-rfc-uri">
              <xsl:with-param name="rfc" select="@value"/>
            </xsl:call-template>
          </xsl:variable>
          <a href="{$uri}">
            <xsl:value-of select="@name" />
            <xsl:if test="@value!=''">&#0160;<xsl:value-of select="@value" /></xsl:if>
          </a>
        </xsl:when>
        <xsl:when test="@name='DOI'">
          <xsl:variable name="uri">
            <xsl:call-template name="compute-doi-uri">
              <xsl:with-param name="doi" select="@value"/>
            </xsl:call-template>
          </xsl:variable>
          <a href="{$uri}">
            <xsl:value-of select="@name" />
            <xsl:if test="@value!=''">&#0160;<xsl:value-of select="@value" /></xsl:if>
          </a>
          <xsl:if test="$doi!='' and $doi!=@value">
            <xsl:call-template name="warning">
              <xsl:with-param name="msg">Unexpected DOI for RFC, found <xsl:value-of select="@value"/>, expected <xsl:value-of select="$doi"/></xsl:with-param>
            </xsl:call-template>
          </xsl:if>
        </xsl:when>
        <xsl:when test="@name='ISBN'">
          <xsl:variable name="uri">
            <xsl:call-template name="compute-isbn-uri">
              <xsl:with-param name="isbn" select="@value"/>
            </xsl:call-template>
          </xsl:variable>
          <a href="{$uri}">
            <xsl:value-of select="@name" />
            <xsl:if test="@value!=''">&#0160;<xsl:value-of select="@value" /></xsl:if>
          </a>
        </xsl:when>
        <xsl:when test="@name='Internet-Draft' and $rfcno > 7375">
          <!-- special case in RFC formatting since 2015 -->            
          <xsl:text>Work in Progress, </xsl:text>
          <xsl:value-of select="@value" />
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="@name" />
          <xsl:if test="@value!=''">&#0160;<xsl:value-of select="@value" /></xsl:if>
          <xsl:if test="translate(@name,$ucase,$lcase)='internet-draft'"> (work in progress)</xsl:if>
        </xsl:otherwise>
      </xsl:choose>

      <!-- check that BCP FYI STD RFC are in the right order -->
      <xsl:if test="(@name='BCP' or @name='FYI' or @name='STD') and preceding-sibling::seriesInfo[@name='RFC']">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">RFC number preceding <xsl:value-of select="@name"/> number in reference '<xsl:value-of select="../@anchor"/>'</xsl:with-param>
        </xsl:call-template>
      </xsl:if>

    </xsl:for-each>

    <!-- Insert DOI for RFCs -->
    <xsl:if test="$xml2rfc-ext-insert-doi='yes' and $doi!='' and not($si[@name='DOI'])">
      <xsl:text>, </xsl:text>
      <xsl:variable name="uri">
        <xsl:call-template name="compute-doi-uri">
          <xsl:with-param name="doi" select="$doi"/>
        </xsl:call-template>
      </xsl:variable>
      <a href="{$uri}">DOI&#160;<xsl:value-of select="$doi"/></a>
    </xsl:if>

    <!-- avoid hacks using seriesInfo when it's not really series information -->
    <xsl:for-each select="x:prose|refcontent">
      <xsl:text>, </xsl:text>
      <xsl:apply-templates/>
    </xsl:for-each>

    <xsl:if test="not(front/date)">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">&lt;date&gt; missing in reference '<xsl:value-of select="@anchor"/>' (note that it can be empty)</xsl:with-param>
      </xsl:call-template>
    </xsl:if>

    <xsl:if test="front/date/@year != ''">
      <xsl:if test="string(number(front/date/@year)) = 'NaN'">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">date/@year should be a number: '<xsl:value-of select="front/date/@year"/>' in reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:text>, </xsl:text>
      <xsl:if test="front/date/@month!=''"><xsl:value-of select="front/date/@month" />&#0160;</xsl:if>
      <xsl:value-of select="front/date/@year" />
    </xsl:if>

    <xsl:choose>
      <xsl:when test="string-length(normalize-space(@target)) &gt; 0">
        <xsl:text>, &lt;</xsl:text>
        <a href="{normalize-space(@target)}"><xsl:value-of select="normalize-space(@target)"/></a>
        <xsl:text>&gt;</xsl:text>
      </xsl:when>
      <xsl:when test="$xml2rfc-ext-link-rfc-to-info-page='yes' and $si[@name='BCP'] and starts-with(@anchor, 'BCP')">
        <xsl:text>, &lt;</xsl:text>
        <xsl:variable name="uri">
          <xsl:call-template name="compute-rfc-info-uri">
            <xsl:with-param name="type" select="'bcp'"/>
            <xsl:with-param name="no" select="$si[@name='BCP']/@value"/>
          </xsl:call-template>
        </xsl:variable>
        <a href="{$uri}"><xsl:value-of select="$uri"/></a>
        <xsl:text>&gt;</xsl:text>
      </xsl:when>
      <xsl:when test="$xml2rfc-ext-link-rfc-to-info-page='yes' and $si[@name='RFC']">
        <xsl:text>, &lt;</xsl:text>
        <xsl:variable name="uri">
          <xsl:call-template name="compute-rfc-info-uri">
            <xsl:with-param name="type" select="'rfc'"/>
            <xsl:with-param name="no" select="$si[@name='RFC']/@value"/>
          </xsl:call-template>
        </xsl:variable>
        <a href="{$uri}"><xsl:value-of select="$uri"/></a>
        <xsl:text>&gt;</xsl:text>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>

    <xsl:text>.</xsl:text>

    <xsl:for-each select="annotation">
      <br />
      <xsl:apply-templates />
    </xsl:for-each>

  </dd>

</xsl:template>

<xsl:template match="references">
  <xsl:call-template name="check-no-text-content"/>

  <xsl:variable name="refseccount" select="count(/rfc/back/references)+count(/rfc/back/ed:replace/ed:ins/references)"/>

  <xsl:choose>
    <!-- insert pseudo section when needed -->
    <xsl:when test="not(preceding::references) and $refseccount!=1">
      <xsl:call-template name="insert-conditional-hrule"/>
      <section id="{$anchor-pref}references">
        <xsl:call-template name="insert-conditional-pagebreak"/>
        <xsl:variable name="sectionNumber">
          <xsl:call-template name="get-references-section-number"/>
        </xsl:variable>
        <xsl:if test="$sectionNumber!=''">
          <xsl:call-template name="insert-errata">
            <xsl:with-param name="section" select="$sectionNumber"/>
          </xsl:call-template>
        </xsl:if>
        <h2 id="{$anchor-pref}section.{$sectionNumber}">
          <a href="#{$anchor-pref}section.{$sectionNumber}">
            <xsl:call-template name="emit-section-number">
              <xsl:with-param name="no" select="$sectionNumber"/>
            </xsl:call-template>
          </a>
          <xsl:text> </xsl:text>
          <xsl:value-of select="$xml2rfc-refparent"/>
        </h2>
        <xsl:for-each select=".|following-sibling::references">
          <xsl:call-template name="make-references">
            <xsl:with-param name="nested" select="true()"/>
          </xsl:call-template>
        </xsl:for-each>
      </section>
    </xsl:when>
    <xsl:when test="preceding::references">
      <!-- already processed -->
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="make-references">
        <xsl:with-param name="nested" select="false()"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="make-references">
  <xsl:param name="nested"/>
  
  <xsl:variable name="name">
    <xsl:if test="ancestor::ed:del">
      <xsl:text>del-</xsl:text>
    </xsl:if>
    <xsl:number level="any"/>
  </xsl:variable>

  <xsl:variable name="elemtype">
    <xsl:choose>
      <xsl:when test="$nested">h3</xsl:when>
      <xsl:otherwise>h2</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:variable name="title">
    <xsl:choose>
      <xsl:when test="name">
        <xsl:if test="@title">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">both @title attribute and name child node present</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
        <xsl:call-template name="render-name">
          <xsl:with-param name="n" select="name/node()"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:when test="not(@title) or @title=''"><xsl:value-of select="$xml2rfc-refparent"/></xsl:when>
      <xsl:otherwise><xsl:value-of select="@title"/></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:variable name="sectionNumber">
    <xsl:call-template name="get-section-number"/>
  </xsl:variable>

  <xsl:variable name="anchorpostfix">
    <xsl:if test="$nested">.<xsl:value-of select="$name"/></xsl:if>
  </xsl:variable>

  <section id="{$anchor-pref}references{$anchorpostfix}">
    <xsl:if test="$name='1'">
      <xsl:call-template name="insert-conditional-pagebreak"/>
    </xsl:if>
    <xsl:if test="$sectionNumber!=''">
      <xsl:call-template name="insert-errata">
        <xsl:with-param name="section" select="$sectionNumber"/>
      </xsl:call-template>
    </xsl:if>
    <xsl:element name="{$elemtype}">
      <xsl:attribute name="id"><xsl:value-of select="concat($anchor-pref,'section.',$sectionNumber)"/></xsl:attribute>
      <a href="#{$anchor-pref}section.{$sectionNumber}">
        <xsl:call-template name="emit-section-number">
          <xsl:with-param name="no" select="$sectionNumber"/>
        </xsl:call-template>
      </a>
      <xsl:text> </xsl:text>
      <xsl:copy-of select="$title"/>
    </xsl:element>
  
    <xsl:variable name="included" select="exslt:node-set($includeDirectives)/myns:include[@in=generate-id(current())]/reference"/>
    <dl class="{$css-reference}">
      <xsl:choose>
        <xsl:when test="$xml2rfc-sortrefs='yes' and $xml2rfc-symrefs!='no'">
          <xsl:apply-templates select="*|$included">
            <xsl:sort select="concat(/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor,.//ed:ins//reference/@anchor)" />
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates select="*|$included"/>
        </xsl:otherwise>
      </xsl:choose>
    </dl>
  </section>
</xsl:template>

<xsl:template match="xi:include">
  <xsl:choose>
    <xsl:when test="not(parent::references)">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'Support for x:include is restricted to child elements of &lt;references>'"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <!-- handled elsewhere -->
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- processed earlier -->
<xsl:template match="references/name"/>

<xsl:template match="rfc">
  <xsl:call-template name="check-no-text-content"/>
  <xsl:variable name="ignored">
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="//processing-instruction('rfc-ext')"/>
      <xsl:with-param name="attr" select="'SANITYCHECK'"/>
    </xsl:call-template>
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="//processing-instruction('rfc')"/>
      <xsl:with-param name="attr" select="'SANITYCHECK'"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="lang">
    <xsl:call-template name="get-lang" />
  </xsl:variable>

  <html lang="{$lang}">
    <head>
      <title>
        <xsl:apply-templates select="front/title" mode="get-text-content" />
      </title>
      <xsl:call-template name="insertScripts" />
      <xsl:call-template name="insertCss" />
      <!-- <link rel="alternate stylesheet" type="text/css" media="screen" title="Plain (typewriter)" href="rfc2629tty.css" /> -->

      <!-- link elements -->
      <xsl:if test="$xml2rfc-toc='yes'">
        <link rel="Contents" href="#{$anchor-pref}toc" />
      </xsl:if>
      <xsl:if test="$xml2rfc-authorship!='no'">
        <link rel="Author" href="#{$anchor-pref}authors" />
      </xsl:if>
      <xsl:if test="$xml2rfc-private=''">
        <xsl:choose>
          <xsl:when test="$no-copylong">
            <link rel="Copyright" href="#{$anchor-pref}copyrightnotice" />
          </xsl:when>
          <xsl:otherwise>
            <link rel="Copyright" href="#{$anchor-pref}copyright" />
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
      <xsl:if test="$has-index">
        <link rel="Index" href="#{$anchor-pref}index" />
      </xsl:if>
      <xsl:apply-templates select="/" mode="links" />
      <xsl:for-each select="x:link|link">
        <link>
          <xsl:choose>
            <xsl:when test="self::x:link and @basename">
              <xsl:attribute name="href">
                <xsl:value-of select="concat(@basename,'.',$outputExtension)"/>
              </xsl:attribute>
              <xsl:copy-of select="@rel|@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:copy-of select="@*" />
            </xsl:otherwise>
          </xsl:choose>
        </link>
      </xsl:for-each>
      <xsl:if test="@number">
        <link rel="Alternate" title="Authoritative ASCII Version" href="http://www.ietf.org/rfc/rfc{@number}.txt" />
        <link rel="Help" title="RFC-Editor's Status Page" href="{$rfc-info-link}" />
        <link rel="Help" title="Additional Information on tools.ietf.org" href="https://tools.ietf.org/html/rfc{@number}"/>
      </xsl:if>

      <!-- generator -->
      <xsl:variable name="gen">
        <xsl:call-template name="get-generator" />
      </xsl:variable>
      <meta name="generator" content="{$gen}" />

      <!-- keywords -->
      <xsl:if test="front/keyword">
        <xsl:variable name="keyw">
          <xsl:call-template name="get-keywords" />
        </xsl:variable>
        <meta name="keywords" content="{$keyw}" />
      </xsl:if>

      <xsl:if test="$xml2rfc-ext-support-rfc2731!='no'">
        <!-- Dublin Core Metadata -->
        <link rel="schema.dcterms" href="http://purl.org/dc/terms/" />

        <!-- DC creator, see RFC2731 -->
        <xsl:for-each select="front/author">
          <xsl:variable name="initials">
            <xsl:call-template name="format-initials"/>
          </xsl:variable>
          <meta name="dcterms.creator" content="{concat(@surname,', ',$initials)}" />
        </xsl:for-each>

        <xsl:if test="$xml2rfc-private=''">
          <xsl:choose>
            <xsl:when test="@number">
              <meta name="dcterms.identifier" content="urn:ietf:rfc:{@number}" />
            </xsl:when>
            <xsl:when test="@docName">
              <meta name="dcterms.identifier" content="urn:ietf:id:{@docName}" />
            </xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
          <meta name="dcterms.issued">
            <xsl:attribute name="content">
              <xsl:value-of select="concat($xml2rfc-ext-pub-year,'-',$pub-month-numeric)"/>
              <xsl:if test="$xml2rfc-ext-pub-day != '' and not(@number)">
                <xsl:value-of select="concat('-',format-number($xml2rfc-ext-pub-day,'00'))"/>
              </xsl:if>
            </xsl:attribute>
          </meta>

          <xsl:if test="@obsoletes!=''">
            <xsl:call-template name="rfclist-for-dcmeta">
              <xsl:with-param name="list" select="@obsoletes"/>
            </xsl:call-template>
          </xsl:if>
        </xsl:if>

        <xsl:if test="front/abstract">
          <meta name="dcterms.abstract" content="{normalize-space(front/abstract)}" />
        </xsl:if>

        <xsl:if test="@number">
          <meta name="dcterms.isPartOf" content="urn:issn:2070-1721" />
        </xsl:if>

      </xsl:if>

      <!-- this replicates dcterms.abstract, but is used by Google & friends -->
      <xsl:if test="front/abstract">
        <meta name="description" content="{normalize-space(front/abstract)}" />
      </xsl:if>
    </head>

    <xsl:call-template name="body" />
  </html>
</xsl:template>

<xsl:template name="body">
  <body>
    <!-- insert onload scripts, when required -->
    <xsl:variable name="onload">
      <xsl:if test="$xml2rfc-ext-insert-metadata='yes' and /rfc/@number">getMeta(<xsl:value-of select="/rfc/@number"/>,"rfc.meta");</xsl:if>
      <xsl:if test="/rfc/x:feedback">initFeedback();</xsl:if>
      <xsl:if test="$xml2rfc-ext-refresh-from!=''">RfcRefresh.initRefresh()</xsl:if>
    </xsl:variable>
    <xsl:if test="$onload!=''">
      <xsl:attribute name="onload">
        <xsl:value-of select="$onload"/>
      </xsl:attribute>
    </xsl:if>

    <xsl:call-template name="add-start-material" />

    <!-- insert diagnostics -->
    <xsl:call-template name="insert-diagnostics"/>

    <xsl:apply-templates select="front" />
    <xsl:apply-templates select="middle" />
    <xsl:call-template name="back" />

    <xsl:call-template name="add-end-material" />
  </body>
</xsl:template>

<xsl:template match="t">
  <xsl:param name="inherited-self-link"/>

  <xsl:variable name="textcontent" select="normalize-space(.)"/>
  <xsl:variable name="endswith" select="substring($textcontent,string-length($textcontent))"/>
  <xsl:variable name="keepwithnext" select="$endswith=':'"/>

  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>

  <xsl:variable name="stype">
    <xsl:choose>
      <xsl:when test="ancestor::abstract">abstract</xsl:when>
      <xsl:when test="ancestor::note">note</xsl:when>
      <xsl:when test="ancestor::boilerplate">boilerplate</xsl:when>
      <xsl:otherwise>section</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:if test="preceding-sibling::section or preceding-sibling::appendix">
    <xsl:call-template name="inline-warning">
      <xsl:with-param name="msg">The paragraph below is misplaced; maybe a section is closed in the wrong place: </xsl:with-param>
      <xsl:with-param name="msg2"><xsl:value-of select="."/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <div>
    <xsl:if test="$p!='' and not(ancestor::list) and not(ancestor::ol) and not(ancestor::ul) and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="concat($anchor-pref,$stype,'.',$p)"/></xsl:attribute>
    </xsl:if>
    <xsl:if test="$keepwithnext">
      <xsl:attribute name="class">avoidbreakafter</xsl:attribute>
    </xsl:if>
    <xsl:apply-templates mode="t-content" select="node()[1]">
      <xsl:with-param name="inherited-self-link" select="$inherited-self-link"/>
      <xsl:with-param name="anchor" select="@anchor"/>
    </xsl:apply-templates>
  </div>
</xsl:template>

<!-- for t-content, dispatch to default templates if it's block-level content -->
<xsl:template mode="t-content" match="list|figure|texttable">
  <!-- <xsl:comment>t-content block-level</xsl:comment>  -->
  <xsl:apply-templates select="." />
  <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content" />
</xsl:template>

<!-- ... otherwise group into p elements -->
<xsl:template mode="t-content" match="*|node()">
  <xsl:param name="inherited-self-link"/>
  <xsl:param name="anchor"/>

  <xsl:variable name="p">
    <xsl:choose>
      <xsl:when test="self::text()">
        <xsl:for-each select="..">
          <xsl:call-template name="get-paragraph-number" />
        </xsl:for-each>
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="get-paragraph-number" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <!-- do not open a new p element if this is a whitespace-only text node and no siblings follow -->
  <xsl:if test="not(self::text() and normalize-space(.)='' and not(following-sibling::node()))">
    <xsl:variable name="textcontent">
      <xsl:apply-templates mode="t-content2" select="." />
    </xsl:variable>

    <xsl:if test="normalize-space($textcontent)!=''">
      <p>
        <xsl:if test="$anchor!=''">
          <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
        </xsl:if>
        <xsl:variable name="stype">
          <xsl:choose>
            <xsl:when test="ancestor::abstract">abstract</xsl:when>
            <xsl:when test="ancestor::note">note</xsl:when>
            <xsl:when test="ancestor::boilerplate">boilerplate</xsl:when>
            <xsl:otherwise>section</xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
        <xsl:variable name="anch">
          <xsl:if test="$p!='' and not(ancestor::ed:del) and not(ancestor::ed:ins) and not(ancestor::li) and not(ancestor::x:lt) and not(preceding-sibling::node())">
            <xsl:value-of select="concat($anchor-pref,$stype,'.',$p)"/>
          </xsl:if>
        </xsl:variable>
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:call-template name="editingMark" />
        <xsl:apply-templates mode="t-content2" select="." />
        <xsl:if test="$xml2rfc-ext-paragraph-links='yes'">
          <xsl:if test="$anch!=''">
            <a class='self' href='#{$anch}'>&#xb6;</a>
          </xsl:if>
          <xsl:if test="$inherited-self-link!=''">
            <a class='self' href='#{$inherited-self-link}'>&#xb6;</a>
          </xsl:if>
        </xsl:if>
      </p>
    </xsl:if>
  </xsl:if>
  <xsl:apply-templates mode="t-content" select="following-sibling::*[self::list or self::figure or self::texttable][1]" />
</xsl:template>

<xsl:template mode="t-content2" match="*">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>

<xsl:template mode="t-content2" match="text()">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>

<xsl:template mode="t-content2" match="comment()|processing-instruction()">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>

<xsl:template match="title">
  <xsl:variable name="t" select="normalize-space(.)"/>
  <xsl:variable name="tlen" select="string-length($t)"/>
  <xsl:variable name="alen" select="string-length(@abbrev)"/>

  <xsl:if test="@abbrev and $alen > 40">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">title/@abbrev too long (max 40 characters)</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:if test="$tlen > 40 and (not(@abbrev) or @abbrev='')">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">title too long, should supply title/@abbrev attribute with less than 40 characters</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:if test="$tlen &lt;= 40 and @abbrev!=''">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">title/@abbrev was specified despite the title being short enough (<xsl:value-of select="$tlen"/>)</xsl:with-param>
      <xsl:with-param name="msg2">Title: '<xsl:value-of select="normalize-space($t)"/>', abbreviated title='<xsl:value-of select="@abbrev"/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:apply-templates />
</xsl:template>

<xsl:template name="insertTitle">
  <xsl:choose>
    <xsl:when test="@ed:old-title">
      <del>
        <xsl:if test="ancestor-or-self::*[@ed:entered-by] and @ed:datetime">
          <xsl:attribute name="title"><xsl:value-of select="concat(@ed:datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
        </xsl:if>
        <xsl:value-of select="@ed:old-title"/>
      </del>
      <ins>
        <xsl:if test="ancestor-or-self::*[@ed:entered-by] and @ed:datetime">
          <xsl:attribute name="title"><xsl:value-of select="concat(@ed:datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
        </xsl:if>
        <xsl:value-of select="@title"/>
      </ins>
    </xsl:when>
    <xsl:when test="name">
      <xsl:if test="@title">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">both @title attribute and name child node present</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:call-template name="render-name">
        <xsl:with-param name="n" select="name/node()"/>
        <xsl:with-param name="strip-links" select="not(ancestor-or-self::figure)"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="@title"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- irefs that are section-level thus can use the section anchor -->
<xsl:variable name="section-level-irefs" select="//section/iref[count(preceding-sibling::*[not(self::iref) and not(self::x:anchor-alias) and not(self::name)])=0]"/>

<xsl:template match="section|appendix">
  <xsl:call-template name="check-no-text-content"/>

  <xsl:if test="self::appendix">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">The "appendix" element is deprecated, use "section" inside "back" instead.</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:variable name="sectionNumber">
    <xsl:choose>
      <xsl:when test="ancestor::boilerplate"></xsl:when>
      <xsl:otherwise><xsl:call-template name="get-section-number" /></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:if test="not(ancestor::section) and not(ancestor::boilerplate)">
    <xsl:call-template name="insert-conditional-hrule"/>
  </xsl:if>

  <xsl:variable name="elemtype">
    <xsl:choose>
      <xsl:when test="count(ancestor::section) &lt;= 3">h<xsl:value-of select="2 + count(ancestor::section)"/></xsl:when>
      <xsl:otherwise>h6</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:if test="$xml2rfc-ext-insert-metadata='yes' and $rfcno!='' and @anchor='rfc.status'">
    <aside id="{$anchor-pref}meta" class="{$css-docstatus}"></aside>
  </xsl:if>

  <xsl:variable name="classes"><xsl:if test="@removeInRFC='true'">rfcEditorRemove</xsl:if></xsl:variable>

  <section>
    <xsl:call-template name="copy-anchor"/>

    <xsl:if test="normalize-space($classes)!=''">
      <xsl:attribute name="class"><xsl:value-of select="normalize-space($classes)"/></xsl:attribute>
    </xsl:if>
    
    <xsl:if test="$sectionNumber!=''">
      <xsl:call-template name="insert-errata">
        <xsl:with-param name="section" select="$sectionNumber"/>
      </xsl:call-template>
    </xsl:if>
    
    <xsl:element name="{$elemtype}">
      <xsl:if test="$sectionNumber!=''">
        <xsl:attribute name="id"><xsl:value-of select="$anchor-pref"/>section.<xsl:value-of select="$sectionNumber"/></xsl:attribute>
      </xsl:if>
      <xsl:choose>
        <xsl:when test="$sectionNumber='1' or $sectionNumber='A'">
          <!-- pagebreak, this the first section -->
          <xsl:attribute name="class">np</xsl:attribute>
        </xsl:when>
        <xsl:when test="not(ancestor::section) and not(ancestor::boilerplate)">
          <xsl:call-template name="insert-conditional-pagebreak"/>
        </xsl:when>
        <xsl:otherwise/>
      </xsl:choose>
  
      <xsl:call-template name="insertInsDelClass" />
  
      <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
        <a href="#{$anchor-pref}section.{$sectionNumber}">
          <xsl:call-template name="emit-section-number">
            <xsl:with-param name="no" select="$sectionNumber"/>
          </xsl:call-template>
        </a>
        <xsl:text>&#0160;</xsl:text>
      </xsl:if>
  
      <!-- issue tracking? -->
      <xsl:if test="@ed:resolves">
        <xsl:call-template name="insert-issue-pointer"/>
      </xsl:if>

      <xsl:call-template name="check-anchor"/>
      <xsl:variable name="anchor">
        <xsl:choose>
          <xsl:when test="@anchor"><xsl:value-of select="@anchor"/></xsl:when>
          <xsl:otherwise><xsl:call-template name="sluggy-anchor"/></xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      
      <xsl:choose>
        <xsl:when test="$anchor!=''">
          <a href="#{$anchor}"><xsl:call-template name="insertTitle"/></a>
        </xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="insertTitle"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:element>

    <xsl:if test="@removeInRFC='true' and t[1]!=$section-removeInRFC">
      <xsl:variable name="t">
        <t><xsl:value-of select="$section-removeInRFC"/></t>
      </xsl:variable>
      <xsl:variable name="link" select="concat($anchor-pref,'section.',$sectionNumber,'.p.1')"/>
      <div id="{$link}">
        <xsl:apply-templates mode="t-content" select="exslt:node-set($t)//text()">
          <xsl:with-param name="inherited-self-link" select="$link"/>
        </xsl:apply-templates>
      </div>
    </xsl:if>

    <!-- continue with all child elements but the irefs processed above -->
    <xsl:for-each select="*">
      <xsl:if test="count(.|$section-level-irefs)!=count($section-level-irefs)">
        <xsl:apply-templates select="."/>
      </xsl:if>
    </xsl:for-each>
  </section>
</xsl:template>

<!-- errata handling -->
<xsl:template name="insert-errata">
  <xsl:param name="section"/>
  <xsl:variable name="es" select="$errata-parsed[section=$section or (not(section) and $section='1')]"/>
  <xsl:if test="$es">
    <aside class="{$css-erratum}">
      <xsl:for-each select="$es">
        <xsl:sort select="@eid" data-type="number"/>
        <div>
          <xsl:variable name="tooltip">
            <xsl:value-of select="@reported-by"/>
            <xsl:text>, </xsl:text>
            <xsl:value-of select="@reported"/>
            <xsl:if test="@type"> (<xsl:value-of select="@type"/>)</xsl:if>
          </xsl:variable>
          <xsl:variable name="uri">
            <xsl:call-template name="compute-rfc-erratum-uri">
              <xsl:with-param name="eid" select="@eid"/>
            </xsl:call-template>
          </xsl:variable>
          <a href="{$uri}" title="{$tooltip}">Erratum <xsl:value-of select="@eid"/></a>
          <xsl:choose>
            <xsl:when test="@status='Verified'"><xsl:text> </xsl:text><span title="verified">&#x2714;</span></xsl:when>
            <xsl:when test="@status='Reported'"><xsl:text> </xsl:text><span title="reported">&#x2709;</span></xsl:when>
            <xsl:when test="@status='Held for Document Update'"><xsl:text> </xsl:text><span title="held for update">&#x2700;</span></xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
        </div>
      </xsl:for-each>
    </aside>
  </xsl:if>
</xsl:template>

<!-- already processed by insertTitle -->
<xsl:template match="note/name"/>
<xsl:template match="section/name"/>

<xsl:template match="spanx[@style='emph' or not(@style)]|em">
  <em>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </em>
</xsl:template>

<xsl:template match="spanx[@style='verb' or @style='vbare']|tt">
  <span class="tt">
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </span>
</xsl:template>

<xsl:template match="spanx[@style='strong']|strong">
  <strong>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </strong>
</xsl:template>

<xsl:template match="spanx[@style!='']" priority="0.1">
  <xsl:call-template name="warning">
    <xsl:with-param name="msg">unknown spanx style attribute '<xsl:value-of select="@style"/>' ignored</xsl:with-param>
  </xsl:call-template>
  <span>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </span>
</xsl:template>

<xsl:template name="insert-blank-lines">
  <xsl:param name="no"/>
  <xsl:choose>
    <xsl:when test="$no >= $xml2rfc-ext-vspace-pagebreak">
      <br/>
      <!-- done; this probably was an attempt to generate a pagebreak -->
    </xsl:when>
    <xsl:when test="$no &lt;= 0">
      <br/>
      <!-- done -->
    </xsl:when>
    <xsl:otherwise>
      <br/>
      <xsl:call-template name="insert-blank-lines">
        <xsl:with-param name="no" select="$no - 1"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="vspace[not(@blankLines)]">
  <br />
</xsl:template>

<xsl:template match="vspace">
  <xsl:call-template name="insert-blank-lines">
    <xsl:with-param name="no" select="@blankLines"/>
  </xsl:call-template>
</xsl:template>

<!-- keep the root for the case when we process XSLT-inline markup -->
<xsl:variable name="src" select="/" />

<xsl:template name="render-section-ref">
  <xsl:param name="from" />
  <xsl:param name="to" />

  <xsl:variable name="refname">
    <xsl:for-each select="$to">
      <xsl:call-template name="get-section-type">
        <xsl:with-param name="prec" select="$from/preceding-sibling::node()[1]" />
      </xsl:call-template>
    </xsl:for-each>
  </xsl:variable>
  <xsl:variable name="refnum">
    <xsl:for-each select="$to">
      <xsl:call-template name="get-section-number" />
    </xsl:for-each>
  </xsl:variable>
  <xsl:variable name="title">
    <xsl:choose>
      <xsl:when test="$to/name">
        <xsl:value-of select="$to/name"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$to/@title"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:attribute name="title">
    <xsl:value-of select="$title" />
  </xsl:attribute>
  <xsl:choose>
    <xsl:when test="$from/@format='counter'">
      <xsl:value-of select="$refnum"/>
    </xsl:when>
    <xsl:when test="$from/@format='title'">
    <xsl:choose>
      <xsl:when test="$to/name">
        <xsl:apply-templates select="$to/name/node()"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$to/@title"/>
      </xsl:otherwise>
    </xsl:choose>
    </xsl:when>
    <xsl:when test="$from/@format='none'">
      <!-- Nothing to do -->
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="normalize-space(concat($refname,'&#160;',$refnum))"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-section-xref-format">
  <xsl:param name="default"/>
  <xsl:choose>
    <xsl:when test="@sectionFormat">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">@sectionFormat is deprecated, use @x:fmt instead</xsl:with-param>
      </xsl:call-template>
      <xsl:if test="@x:fmt">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">both @x:fmt and @sectionFormat specified</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:choose>
        <xsl:when test="@sectionFormat='parens' or @sectionFormat='of' or @sectionFormat='comma' or @sectionFormat='section' or @sectionFormat='number-only'">
          <xsl:value-of select="@sectionFormat"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">unknown format for @sectionFormat</xsl:with-param>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="@x:fmt">
      <xsl:choose>
        <xsl:when test="@x:fmt='()'">parens</xsl:when>
        <xsl:when test="@x:fmt='of'">of</xsl:when>
        <xsl:when test="@x:fmt=','">comma</xsl:when>
        <xsl:when test="@x:fmt='none'">none</xsl:when>
        <xsl:when test="@x:fmt='sec'">section</xsl:when>
        <xsl:when test="@x:fmt='number'">number-only</xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">unknown format for @x:fmt</xsl:with-param>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$default"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-section-xref-section">
  <xsl:choose>
    <xsl:when test="@section">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">@section is deprecated, use @x:sec instead</xsl:with-param>
      </xsl:call-template>
      <xsl:if test="@x:sec">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">both @x:sec and @section specified</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:value-of select="@section"/>
    </xsl:when>
    <xsl:when test="@x:sec">
      <xsl:value-of select="@x:sec"/>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:template>

<xsl:template match="xref[node()]">

  <xsl:variable name="target" select="@target" />
  <xsl:variable name="node" select="key('anchor-item',$target)" />
  <xsl:variable name="anchor"><xsl:value-of select="$anchor-pref"/>xref.<xsl:value-of select="@target"/>.<xsl:number level="any" count="xref[@target=$target]"/></xsl:variable>

  <xsl:variable name="sfmt">
    <xsl:call-template name="get-section-xref-format"/>
  </xsl:variable>

  <xsl:variable name="ssec">
    <xsl:call-template name="get-section-xref-section"/>
  </xsl:variable>

  <xsl:choose>
    <!-- $sfmt='none': do not generate any links -->
    <xsl:when test="$sfmt='none'">
      <xsl:choose>
        <xsl:when test="$node/self::reference">
          <cite title="{normalize-space($node/front/title)}">
            <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:apply-templates/>
          </cite>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>

    <!-- Other $sfmt values than "none": unsupported -->
    <xsl:when test="$sfmt!='' and $sfmt!='none'">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('unknown xref section format extension: ',$sfmt)"/>
      </xsl:call-template>
    </xsl:when>

    <!-- Section links -->
    <xsl:when test="$node/self::section or $node/self::appendix">
      <xsl:choose>
        <xsl:when test="@format='none'">
          <a href="#{@target}">
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:apply-templates/>
          </a>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates/>
          <xsl:text> (</xsl:text>
          <a href="#{@target}">
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:call-template name="render-section-ref">
              <xsl:with-param name="from" select="."/>
              <xsl:with-param name="to" select="$node"/>
            </xsl:call-template>
          </a>
          <xsl:text>)</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>

    <xsl:when test="$node/self::cref and $xml2rfc-comments='no'">
      <xsl:call-template name="error">
        <xsl:with-param name="msg">xref to cref, but comments aren't included in the output</xsl:with-param>
      </xsl:call-template>
    </xsl:when>

    <xsl:otherwise>
      <!-- check normative/informative -->
      <xsl:variable name="t-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
      <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
      <xsl:if test="count($node)=1 and $is-normative">
        <xsl:variable name="t-r-is-normative" select="$node/ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
        <xsl:if test="not($r-is-normative)">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg" select="concat('Potentially normative reference to ',@target,' not referenced normatively')"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:if>

      <a href="#{$target}">
        <xsl:if test="@format='none'">
          <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
            <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
          </xsl:if>
        </xsl:if>
        
        <xsl:apply-templates />
      </a>
      <xsl:if test="not(@format='none')">
        <xsl:for-each select="$src/rfc/back/references//reference[@anchor=$target]">
          <xsl:text> </xsl:text>
          <cite title="{normalize-space(front/title)}">
            <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:call-template name="reference-name"/>
          </cite>
        </xsl:for-each>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:key name="iref-xanch" match="iref[@x:for-anchor]" use="@x:for-anchor"/>

<xsl:template match="xref[not(node())]">

  <xsl:variable name="xref" select="."/>
  <xsl:variable name="anchor"><xsl:value-of select="$anchor-pref"/>xref.<xsl:value-of select="$xref/@target"/>.<xsl:number level="any" count="xref[@target=$xref/@target]"/></xsl:variable>
  
  <xsl:variable name="sfmt">
    <xsl:call-template name="get-section-xref-format">
      <xsl:with-param name="default">
        <xsl:choose>
          <xsl:when test="ancestor::artwork">comma</xsl:when>
          <xsl:otherwise>of</xsl:otherwise>
        </xsl:choose>
      </xsl:with-param>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="ssec">
    <xsl:call-template name="get-section-xref-section"/>
  </xsl:variable>

  <!-- ensure we have the right context, this <xref> may be processed from within the boilerplate -->
  <xsl:for-each select="$src">

    <xsl:variable name="node" select="key('anchor-item',$xref/@target)|exslt:node-set($includeDirectives)//reference[@anchor=$xref/@target]"/>
    <xsl:if test="count($node)=0 and not($node/ancestor::ed:del)">
      <xsl:for-each select="$xref">
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="concat('Undefined target: ',$xref/@target)"/>
        </xsl:call-template>
      </xsl:for-each>
    </xsl:if>

    <xsl:choose>

      <!-- Section links -->
      <xsl:when test="$node/self::section or $node/self::appendix">
        <a href="#{$xref/@target}">
          <!-- insert id when a backlink to this xref is needed in the index -->
          <xsl:if test="key('iref-xanch',$xref/@target) | key('iref-xanch','')[../@anchor=$xref/@target]">
            <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
          </xsl:if>
          <xsl:call-template name="render-section-ref">
            <xsl:with-param name="from" select="$xref"/>
            <xsl:with-param name="to" select="$node"/>
          </xsl:call-template>
        </a>
      </xsl:when>

      <!-- Figure links -->
      <xsl:when test="$node/self::figure">
        <a href="#{$xref/@target}">
          <xsl:variable name="figcnt">
            <xsl:for-each select="$node">
              <xsl:call-template name="get-figure-number"/>
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$figcnt" />
            </xsl:when>
            <xsl:when test="$xref/@format='none'">
              <!-- Nothing to do -->
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:value-of select="$node/@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Figure&#160;',$figcnt))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>

      <!-- Table links -->
      <xsl:when test="$node/self::texttable or $node/self::table">
        <a href="#{$xref/@target}">
          <xsl:variable name="tabcnt">
            <xsl:for-each select="$node">
              <xsl:call-template name="get-table-number"/>
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$tabcnt" />
            </xsl:when>
            <xsl:when test="$xref/@format='none'">
              <!-- Nothing to do -->
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:choose>
                <xsl:when test="$node/self::table">
                  <xsl:call-template name="render-name-ref">
                    <xsl:with-param name="n" select="$node/name/node()"/>
                  </xsl:call-template>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="$node/@title" />
                </xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Table&#160;',$tabcnt))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>

      <!-- Paragraph links -->
      <xsl:when test="$node/self::t or $node/self::aside or $node/self::blockquote or $node/self::dl or $node/self::ol or $node/self::ul or $node/self::dt or $node/self::li">
        <a href="#{$xref/@target}">
          <xsl:variable name="tcnt">
            <xsl:for-each select="$node">
              <xsl:call-template name="get-paragraph-number" />
            </xsl:for-each>
          </xsl:variable>
          <xsl:variable name="pparent" select="$node/.."/>
          <xsl:variable name="listtype">
            <xsl:choose>
              <xsl:when test="$pparent/self::list">
                <xsl:value-of select="$pparent/@style"/>
              </xsl:when>
              <xsl:when test="$pparent/self::dl">definition</xsl:when> 
              <xsl:when test="$pparent/self::ol[@type='a']">letters</xsl:when> 
              <xsl:when test="$pparent/self::ol[@type='A']">Letters</xsl:when> 
              <xsl:when test="$pparent/self::ol[@type='i']">rnumbers</xsl:when> 
              <xsl:when test="$pparent/self::ol[@type='I']">Rnumbers</xsl:when> 
              <xsl:when test="$pparent/self::ol[string-length(@type)>1]">format <xsl:value-of select="$pparent/self::ol/@type"/></xsl:when> 
              <xsl:when test="$pparent/self::ol">numbers</xsl:when> 
              <xsl:otherwise></xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
          <xsl:variable name="s">
            <xsl:choose>
              <xsl:when test="$pparent/@group">
                <xsl:call-template name="ol-start">
                  <xsl:with-param name="node" select="$pparent"/>
                </xsl:call-template>
              </xsl:when>
              <xsl:when test="$pparent/@start">
                <xsl:value-of select="$pparent/@start"/>
              </xsl:when>
              <xsl:otherwise>1</xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
          <xsl:variable name="n">
            <xsl:for-each select="$node">
              <xsl:number/>
            </xsl:for-each>
          </xsl:variable>
          <xsl:variable name="format">
            <xsl:choose>
              <xsl:when test="$listtype='letters'">a</xsl:when>
              <xsl:when test="$listtype='Letters'">A</xsl:when>
              <xsl:when test="$listtype='rnumbers'">i</xsl:when>
              <xsl:when test="$listtype='Rnumbers'">I</xsl:when>
              <xsl:otherwise>1</xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
          <xsl:variable name="listindex">
            <xsl:choose>
              <xsl:when test="starts-with($listtype,'format ')">
                <xsl:call-template name="expand-format-percent">
                  <xsl:with-param name="format" select="substring-after($listtype,'format ')"/>
                  <xsl:with-param name="pos" select="$n + $s - 1"/>
                </xsl:call-template>
              </xsl:when>
              <xsl:otherwise>
                <xsl:number value="$n + $s - 1" format="{$format}"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:choose>
                <xsl:when test="$listtype!='' and $listindex!=''">
                  <xsl:value-of select="$listindex"/>
                </xsl:when>
                <xsl:when test="$listtype!='' and $listindex=''">
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg" select="concat('Use of format=counter for unsupported list type ',$listtype)"/>
                  </xsl:call-template>
                  <xsl:value-of select="$tcnt"/>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="$tcnt"/>              
                </xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:when test="$xref/@format='none'">
              <!-- Nothing to do -->
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:choose>
                <xsl:when test="$node/self::dt">
                  <xsl:apply-templates select="$node/node()"/>
                </xsl:when>
                <xsl:when test="$node/@hangText">
                  <xsl:value-of select="$node/@hangText"/>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="$node/@title" />
                </xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise>
              <xsl:variable name="pn" select="normalize-space(substring-after($tcnt,'p.'))"/>
              <xsl:text>Paragraph&#160;</xsl:text>
              <xsl:choose>
                <xsl:when test="$pn=''">
                  <xsl:text>?</xsl:text>
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg" select="concat('No paragraph number for link target ',$xref/@target)"/>
                  </xsl:call-template>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$pn"/></xsl:otherwise>
              </xsl:choose>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>

      <!-- Comment links -->
      <xsl:when test="$node/self::cref">
        <xsl:choose>
          <xsl:when test="$xml2rfc-comments!='no'">
            <a href="#{$xref/@target}">
              <xsl:variable name="name">
                <xsl:for-each select="$node">
                  <xsl:call-template name="get-comment-name" />
                </xsl:for-each>
              </xsl:variable>
              <xsl:choose>
                <xsl:when test="$xref/@format='counter'">
                  <xsl:value-of select="$name" />
                </xsl:when>
                <xsl:when test="$xref/@format='none'">
                  <!-- Nothing to do -->
                </xsl:when>
                <xsl:when test="$xref/@format='title'">
                  <xsl:value-of select="$node/@title" />
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="normalize-space(concat('Comment&#160;',$name))"/>
                </xsl:otherwise>
              </xsl:choose>
            </a>
          </xsl:when>
          <xsl:otherwise>
            <xsl:for-each select="$xref">
              <xsl:call-template name="error">
                <xsl:with-param name="msg">xref to cref, but comments aren't included in the output</xsl:with-param>
              </xsl:call-template>
            </xsl:for-each>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:when>

      <!-- Reference links -->
      <xsl:when test="$node/self::reference">

        <!-- check normative/informative -->
        <xsl:variable name="t-is-normative" select="$xref/ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
        <xsl:if test="count($node)=1 and $is-normative">
          <xsl:variable name="t-r-is-normative" select="$node/ancestor-or-self::*[@x:nrm][1]"/>
          <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
          <xsl:if test="not($r-is-normative)">
            <xsl:for-each select="$xref">
              <xsl:call-template name="warning">
                <xsl:with-param name="msg" select="concat('Potentially normative reference to ',$xref/@target,' not referenced normatively')"/>
              </xsl:call-template>
            </xsl:for-each>
          </xsl:if>
        </xsl:if>

        <xsl:variable name="href">
          <xsl:call-template name="computed-target">
            <xsl:with-param name="bib" select="$node"/>
            <xsl:with-param name="ref" select="$xref"/>
          </xsl:call-template>
        </xsl:variable>

        <xsl:variable name="sec">
          <xsl:choose>
            <xsl:when test="starts-with($xref/@x:rel,'#') and $ssec=''">
              <xsl:call-template name="compute-section-number">
                <xsl:with-param name="bib" select="$node"/>
                <xsl:with-param name="ref" select="$xref"/>
              </xsl:call-template>
            </xsl:when>
            <xsl:when test="$xref/@x:rel and not(starts-with($xref/@x:rel,'#')) and $ssec=''">
              <xsl:call-template name="error">
                <xsl:with-param name="msg">x:rel attribute '<xsl:value-of select="$xref/@x:rel"/>' in reference to <xsl:value-of select="$node/@anchor"/> is expected to start with '#'.</xsl:with-param>
              </xsl:call-template>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="$ssec"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:variable>

        <xsl:variable name="secterm">
          <xsl:choose>
            <!-- starts with letter? -->
            <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">Appendix</xsl:when>
            <xsl:otherwise>Section</xsl:otherwise>
          </xsl:choose>
        </xsl:variable>

        <xsl:variable name="title">
          <xsl:choose>
            <xsl:when test="starts-with($xref/@x:rel,'#') and $ssec='' and $node/x:source/@href">
              <xsl:variable name="extdoc" select="document($node/x:source/@href)"/>
              <xsl:variable name="nodes" select="$extdoc//*[@anchor=substring-after($xref//@x:rel,'#')]"/>
              <xsl:if test="not($nodes)">
                <xsl:call-template name="error">
                  <xsl:with-param name="msg">Anchor '<xsl:value-of select="substring-after($xref//@x:rel,'#')"/>' not found in <xsl:value-of select="$node/x:source/@href"/>.</xsl:with-param>
                </xsl:call-template>
              </xsl:if>
              <xsl:for-each select="$nodes">
                <xsl:value-of select="@title"/>
              </xsl:for-each>
            </xsl:when>
            <xsl:otherwise />
          </xsl:choose>
        </xsl:variable>

        <!--
        Formats:

          parens  [XXXX] (Section SS)
          comma   [XXXX], Section SS
          of      Section SS of [XXXX]
          sec     Section SS
          number  SS
        -->

        <xsl:if test="$sfmt!='' and not($sfmt='of' or $sfmt='section' or $sfmt='number-only' or $sfmt='parens' or $sfmt='comma')">
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="concat('unknown xref section format extension: ',$sfmt)"/>
          </xsl:call-template>
        </xsl:if>

        <xsl:if test="$sec!=''">

          <xsl:choose>
            <xsl:when test="$sfmt='of' or $sfmt='section'">
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:if test="$sfmt='section' and $xml2rfc-ext-include-references-in-index='yes'">
                      <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$secterm"/>
                    <xsl:text> </xsl:text>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
              <xsl:if test="$sfmt='of'">
                <xsl:text> of </xsl:text>
              </xsl:if>
            </xsl:when>
            <xsl:when test="$sfmt='number-only'">
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
                      <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise />
          </xsl:choose>
        </xsl:if>

        <xsl:if test="$sec='' or ($sfmt!='section' and $sfmt!='number-only')">
          <xsl:choose>
            <xsl:when test="$xref/@format='none'">
              <!-- Nothing to do -->
            </xsl:when>
            <xsl:otherwise>
              <a href="#{$xref/@target}">
                <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
                  <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
                </xsl:if>
                <cite title="{normalize-space($node/front/title)}">
                  <xsl:variable name="val">
                    <xsl:call-template name="reference-name">
                      <xsl:with-param name="node" select="$node" />
                    </xsl:call-template>
                  </xsl:variable>
                  <xsl:choose>
                    <xsl:when test="$xref/@format='counter'">
                      <!-- remove brackets -->
                      <xsl:value-of select="substring($val,2,string-length($val)-2)"/>
                    </xsl:when>
                    <xsl:when test="$xref/@format='title'">
                      <xsl:value-of select="$node/front/title"/>
                    </xsl:when>
                    <xsl:otherwise>
                      <xsl:value-of select="$val"/>
                    </xsl:otherwise>
                  </xsl:choose>
                </cite>
              </a>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:if>

        <xsl:if test="$sec!=''">
          <xsl:choose>
            <xsl:when test="$sfmt='parens'">
              <xsl:text> (</xsl:text>
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}"><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
              <xsl:text>)</xsl:text>
            </xsl:when>
            <xsl:when test="$sfmt='comma'">
              <xsl:text>, </xsl:text>
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$secterm"/>
                    <xsl:text> </xsl:text>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
        </xsl:if>
      </xsl:when>

      <xsl:otherwise>
        <xsl:if test="$node">
          <!-- make it the correct context -->
          <xsl:for-each select="$xref">
            <xsl:call-template name="error">
              <xsl:with-param name="msg" select="concat('xref to unknown element: ',name($node))"/>
            </xsl:call-template>
          </xsl:for-each>
        </xsl:if>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>


<!-- mark unmatched elements red -->

<xsl:template match="*">
  <xsl:call-template name="error">
    <xsl:with-param name="inline" select="'no'"/>
    <xsl:with-param name="msg">no XSLT template for element '<xsl:value-of select="name()"/>'</xsl:with-param>
  </xsl:call-template>
  <span class="tt {$css-error}">&lt;<xsl:value-of select="name()" />&gt;</span>
  <xsl:copy><xsl:apply-templates select="node()|@*" /></xsl:copy>
  <span class="tt {$css-error}">&lt;/<xsl:value-of select="name()" />&gt;</span>
</xsl:template>

<xsl:template match="/">
  <xsl:apply-templates select="*" mode="validate"/>
  <xsl:apply-templates select="*" />
</xsl:template>

<!-- utility templates -->

<xsl:template name="collectLeftHeaderColumn">
  <!-- default case -->
  <xsl:if test="$xml2rfc-private=''">
    <xsl:choose>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='independent'">
        <myns:item>Independent Submission</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IETF'">
        <myns:item>Internet Engineering Task Force (IETF)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IRTF'">
        <myns:item>Internet Research Task Force (IRTF)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IAB'">
        <myns:item>Internet Architecture Board (IAB)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/front/workgroup and (not(/rfc/@number) or /rfc/@number='')">
        <xsl:choose>
          <xsl:when test="starts-with(/rfc/@docName,'draft-ietf-') and $submissionType='IETF'"/>
          <xsl:when test="starts-with(/rfc/@docName,'draft-irft-') and $submissionType='IRTF'"/>
          <xsl:otherwise>
            <xsl:call-template name="info">
              <xsl:with-param name="msg">The /rfc/front/workgroup should only be used for Working/Research Group drafts</xsl:with-param>
            </xsl:call-template>
          </xsl:otherwise>
        </xsl:choose>
        <xsl:for-each select="/rfc/front/workgroup">
          <xsl:variable name="v" select="normalize-space(.)"/>
          <xsl:variable name="tmp" select="translate($v, $ucase, $lcase)"/>
          <xsl:if test="contains($tmp,' research group') or contains($tmp,' working group')">
            <xsl:call-template name="info">
              <xsl:with-param name="msg">No need to include 'Working Group' or 'Research Group' postfix in /rfc/front/workgroup value '<xsl:value-of select="$v"/>'</xsl:with-param>
            </xsl:call-template>
          </xsl:if>
          <xsl:variable name="h">
            <!-- when a single name, append WG/RG postfix automatically -->
            <xsl:choose>
              <xsl:when test="not(contains($v, ' ')) and starts-with(/rfc/@docName,'draft-ietf-') and $submissionType='IETF'">
                <xsl:value-of select="concat($v, ' Working Group')"/>
              </xsl:when>
              <xsl:when test="not(contains($v, ' ')) and starts-with(/rfc/@docName,'draft-irtf-') and $submissionType='IRTF'">
                <xsl:value-of select="concat($v, ' Research Group')"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="$v"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
          <myns:item>
            <xsl:value-of select="$h"/>
          </myns:item>
        </xsl:for-each>
      </xsl:when>
      <xsl:otherwise>
        <xsl:if test="starts-with(/rfc/@docName,'draft-ietf-') and not(/rfc/front/workgroup)">
          <xsl:call-template name="info">
            <xsl:with-param name="msg">WG submissions should include a /rfc/front/workgroup element</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
        <myns:item>Network Working Group</myns:item>
      </xsl:otherwise>
    </xsl:choose>
    <!-- check <area> value -->
    <xsl:for-each select="/rfc/front/area">
      <xsl:variable name="area" select="normalize-space(.)"/>
      <xsl:variable name="rallowed">
        <xsl:if test="$pub-yearmonth &lt; 201509">
          <ed:v>Applications</ed:v>
          <ed:v>app</ed:v>
        </xsl:if>
        <xsl:if test="$pub-yearmonth &gt; 201505">
          <ed:v>Applications and Real-Time</ed:v>
          <ed:v>art</ed:v>
        </xsl:if>
        <ed:v>General</ed:v>
        <ed:v>gen</ed:v>
        <ed:v>Internet</ed:v>
        <ed:v>int</ed:v>
        <ed:v>Operations and Management</ed:v>
        <ed:v>ops</ed:v>
        <xsl:if test="$pub-yearmonth &lt; 201509">
          <ed:v>Real-time Applications and Infrastructure</ed:v>
          <ed:v>rai</ed:v>
        </xsl:if>
        <ed:v>Routing</ed:v>
        <ed:v>rtg</ed:v>
        <ed:v>Security</ed:v>
        <ed:v>sec</ed:v>
        <ed:v>Transport</ed:v>
        <ed:v>tsv</ed:v>
      </xsl:variable>
      <xsl:variable name="allowed" select="exslt:node-set($rallowed)"/>
      <xsl:choose>
        <xsl:when test="$allowed/ed:v=$area">
          <!-- ok -->
        </xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">Unknown IETF area: "<xsl:value-of select="$area"/>" - should be one of: <xsl:for-each select="$allowed/ed:v">
              <xsl:text>"</xsl:text>
              <xsl:value-of select="."/>
              <xsl:text>"</xsl:text>
              <xsl:if test="position()!=last()">
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    <myns:item>
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            <xsl:value-of select="concat(translate(/rfc/@category,$lcase,$ucase),': ',/rfc/@seriesNo)" />
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    <xsl:if test="/rfc/@updates!=''">
      <myns:item>
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          <xsl:if test="not(/rfc/@number)"> (if approved)</xsl:if>
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    <myns:item>
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<xsl:template name="collectRightHeaderColumn">
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<xsl:template name="emitheader">
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<xsl:template name="expirydate">
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<xsl:template name="normalize-date">
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</xsl:template>

<xsl:template name="get-month-as-num">
  <xsl:param name="month" />
  <xsl:choose>
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    <xsl:when test="$month='February'">02</xsl:when>
    <xsl:when test="$month='March'">03</xsl:when>
    <xsl:when test="$month='April'">04</xsl:when>
    <xsl:when test="$month='May'">05</xsl:when>
    <xsl:when test="$month='June'">06</xsl:when>
    <xsl:when test="$month='July'">07</xsl:when>
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    <xsl:when test="$month='September'">09</xsl:when>
    <xsl:when test="$month='October'">10</xsl:when>
    <xsl:when test="$month='November'">11</xsl:when>
    <xsl:when test="$month='December'">12</xsl:when>
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</xsl:template>

<xsl:template name="get-month-as-name">
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    <xsl:when test="$month=2">February</xsl:when>
    <xsl:when test="$month=3">March</xsl:when>
    <xsl:when test="$month=4">April</xsl:when>
    <xsl:when test="$month=5">May</xsl:when>
    <xsl:when test="$month=6">June</xsl:when>
    <xsl:when test="$month=7">July</xsl:when>
    <xsl:when test="$month=8">August</xsl:when>
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<xsl:template name="get-authors-section-number">
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            or assist in its implementation may be prepared, copied, published and
            distributed, in whole or in part, without restriction of any kind,
            provided that the above copyright notice and this paragraph are
            included on all such copies and derivative works. However, this
            document itself may not be modified in any way, such as by removing
            the copyright notice or references to the Internet Society or other
            Internet organizations, except as needed for the purpose of
            developing Internet standards in which case the procedures for
            copyrights defined in the Internet Standards process must be
            followed, or as required to translate it into languages other than
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            The limited permissions granted above are perpetual and will not be
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            might or might not be available; nor does it represent that it has
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            Copies of IPR disclosures made to the IETF Secretariat and any
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            under such rights might or might not be available; neither does
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          <t>
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            <xsl:choose>
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      <xsl:when test="$funding0 and /rfc/@number">
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            <xsl:choose>
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              <xsl:otherwise>Acknowledgment</xsl:otherwise>
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          <t>
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<xsl:template name="insertScripts">
<xsl:if test="$xml2rfc-ext-refresh-from!=''">
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      msg += "Error details: " + e;
      err.appendChild(document.createTextNode(msg));
      RfcRefresh.showMessage("refreshxmlerror", err);
    }
  }
}

RfcRefresh.findAndUpdate = function(olddoc, elem) {
  var changed = "";
  var children = elem.childNodes;
  for (var i = 0; i != children.length; i++) {
    var n = children[i];
    if (n.nodeType == 1) {
      var c = RfcRefresh.findAndUpdate(olddoc, n);
      if (changed == '') {
        changed = c;
      }
      var id = n.id;
      if (id != "") {
        var old = olddoc.getElementById(id);
        var newtext = n.innerHTML;
        if (!old) {
          console.debug("new " + id);
        } else {
          var oldtext = old.innerHTML;
          if (oldtext != newtext) {
            console.debug("updating " + id);
            old.innerHTML = n.innerHTML;
            if (changed == '') {
              changed = id;
            }
          }
        }
      }
    }
  }
  return changed;
}

RfcRefresh.findDifferences = function(olddoc, newdoc) {
  var changed = RfcRefresh.findAndUpdate(olddoc, newdoc.documentElement);
  if (changed != "") {
    console.debug("changed: " + changed);
    document.location = "#" + changed;
  }
  // final check for changes; if those were not processed earlier,
  // we refresh the whole document
  var oldtext = olddoc.documentElement.getElementsByTagName("body")[0].innerHTML;
  var newtext = newdoc.documentElement.getElementsByTagName("body")[0].innerHTML;
  if (oldtext != newtext) {
    console.debug("full refresh: " + newtext);
    olddoc.documentElement.innerHTML = newdoc.documentElement.innerHTML;
  }
}

RfcRefresh.getNodeText = function(elem) {
  var result = "";
  var children = elem.childNodes;
  for (var i = 0; i != children.length; i++) {
    if (children[i].nodeType == 3) {
      result += children[i].nodeValue;
    }
  }
  return result; 
}

RfcRefresh.getParserError = function(dom) {
  // FIREFOX
  if ("parsererror" == dom.documentElement.nodeName &amp;&amp; RfcRefresh.NS_MOZERR == dom.documentElement.namespaceURI) {
    var errmsg = new Object();
    errmsg.msg = "";
    errmsg.src = "";
    var children = dom.documentElement.childNodes;
    for (var i = 0; i != children.length; i++) {
      if (children[i].nodeType == 3) {
        errmsg.msg += children[i].nodeValue;
      } else if (children[i].nodeName == "sourcetext") {
        errmsg.src = RfcRefresh.getNodeText(children[i]);
      }
    }
    return errmsg;
  }
  
  var list = dom.getElementsByTagNameNS(RfcRefresh.NS_XHTML, "parsererror");
  if (list.length != 0) {
    // Webkit
    var errmsg = new Object();
    errmsg.msg = "XML parse error";
    list = dom.getElementsByTagNameNS(RfcRefresh.NS_XHTML, "div");
    if (list.length != 0) {
      errmsg.msg = RfcRefresh.getNodeText(list[0]);
    }
    return errmsg;
  }  
  
  
  return null;
}

RfcRefresh.showMessage = function(cls, node) {
  // remove previous message
  var list = document.getElementsByClassName(cls);
  if (list.length != 0) {
    list[0].parentNode.removeChild(list[0]);
  }
  document.body.appendChild(node);
}

RfcRefresh.refresh = function(txt) {
  if (txt != RfcRefresh.lastTxt) {
    RfcRefresh.lastTxt = txt;
    // try to parse
    var parser = new DOMParser();
    var dom = parser.parseFromString(txt, "text/xml");
    var errmsg = RfcRefresh.getParserError(dom);
    
    if (errmsg != null) {
      var err = document.createElement("pre");
      err.className = "refreshxmlerror <xsl:value-of select="$css-noprint"/>";
      err.appendChild(document.createTextNode(errmsg.msg));
      if (errmsg.src != null) {
        err.appendChild(document.createElement("hr"));
        err.appendChild(document.createTextNode(errmsg.src));
      }
      RfcRefresh.showMessage("refreshxmlerror", err);
    } else {
      // find new refresh
      var children = dom.childNodes;
      for (var i = 0; i != children.length; i++) {
        if (children[i].nodeType == 7 &amp;&amp; children[i].target == "rfc-ext") {
          var s = "&lt;foo " + children[i].data + "/>";
          var sd = parser.parseFromString(s, "text/xml");
          var refresh = sd.documentElement.getAttribute("refresh-interval");
          if (refresh != null &amp;&amp; refresh != "") {
            refresh = parseInt(refresh, 10);
            if (RfcRefresh.interval != refresh) {
              if (Number.isNaN(refresh) || refresh &lt; 5) {
                console.debug("refresh requested to be: " + refresh + " - ignored, using 5 instead.");
                RfcRefresh.interval = 5;
              } else {
                RfcRefresh.interval = refresh;
                console.debug("refresh changed to: " + refresh);
              }
            }
          }
        }
      }
    
      var html = RfcRefresh.xslt.transformToDocument(dom);
      RfcRefresh.findDifferences(document, html);
    }
  }
}

RfcRefresh.initRefresh = function() {
  RfcRefresh.getXSLT();
    
  window.setTimeout(function(){
    if (RfcRefresh.xslt != null) {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", RfcRefresh.xmlsource, true);
      if (RfcRefresh.lastEtag != "") {
        xhr.setRequestHeader("If-None-Match", RfcRefresh.lastEtag);
      }
      xhr.onload = function (e) {
        if (xhr.readyState === 4) {
          console.debug(xhr.status + " " + xhr.statusText);
          if (xhr.status != 304) {
            RfcRefresh.refresh(xhr.responseText);
          }
          RfcRefresh.lastEtag = xhr.getResponseHeader("ETag");
        }
      }
      xhr.onerror = function (e) {
        console.error(xhr.status + " " + xhr.statusText);
      };
      xhr.send(null);
      setTimeout(arguments.callee, RfcRefresh.interval * 1000);
    }
  }, RfcRefresh.interval * 1000);
}
</script>
</xsl:if>
<xsl:if test="/rfc/x:feedback">
<script type="application/javascript">
var buttonsAdded = false;

function initFeedback() {
  var fb = document.createElement("div");
  fb.className = "<xsl:value-of select="concat($css-feedback,' ',$css-noprint)"/>";
  fb.setAttribute("onclick", "feedback();");
  fb.appendChild(document.createTextNode("feedback"));

  document.body.appendChild(fb);
}

function feedback() {
  toggleButtonsToElementsByName("h2");
  toggleButtonsToElementsByName("h3");
  toggleButtonsToElementsByName("h4");
  toggleButtonsToElementsByName("h5");

  buttonsAdded = !buttonsAdded;
}

function toggleButtonsToElementsByName(name) {
  var list = document.getElementsByTagName(name);
  for (var i = 0; i &lt; list.length; i++) {
    toggleButton(list.item(i));
  }
}

function toggleButton(node) {
  if (! buttonsAdded) {

    // docname
    var template = "<xsl:call-template name="replace-substring">
  <xsl:with-param name="string" select="/rfc/x:feedback/@template"/>
  <xsl:with-param name="replace">"</xsl:with-param>
  <xsl:with-param name="by">\"</xsl:with-param>
</xsl:call-template>";

    var id = node.getAttribute("id");
    // try also parent
    if (id == null || id == "") {
      var id = node.parentNode.getAttribute("id");
    }
    // better id available?
    var titlelinks = node.getElementsByTagName("a");
    for (var i = 0; i &lt; titlelinks.length; i++) {
      var tl = titlelinks.item(i);
      if (tl.getAttribute("id")) {
        id = tl.getAttribute("id");
      }
    }
    
    // ref
    var ref = window.location.toString();
    var hash = ref.indexOf("#");
    if (hash != -1) {
      ref = ref.substring(0, hash);
    }
    if (id != null &amp;&amp; id != "") {
      ref += "#" + id;
    }

    // docname
    var docname = "<xsl:value-of select="/rfc/@docName"/>";

    // section
    var section = node.textContent;
    section = section.replace("\u00a0", " ").trim();

    // build URI from template
    var uri = template.replace("{docname}", encodeURIComponent(docname));
    uri = uri.replace("{section}", encodeURIComponent(section));
    uri = uri.replace("{ref}", encodeURIComponent(ref));

    var button = document.createElement("a");
    button.className = "<xsl:value-of select="concat($css-fbbutton,' ',$css-noprint)"/>";
    button.setAttribute("href", uri);
    button.appendChild(document.createTextNode("send feedback"));
    node.appendChild(button);
  }
  else {
    var buttons = node.getElementsByTagName("a");
    for (var i = 0; i &lt; buttons.length; i++) {
      var b = buttons.item(i);
      if (b.className == "<xsl:value-of select="concat($css-fbbutton,' ',$css-noprint)"/>") {
        node.removeChild(b);
      }
    }
  }
}</script>
</xsl:if>
<xsl:if test="$xml2rfc-ext-insert-metadata='yes' and $rfcno!=''">
<script type="application/javascript">
function getMeta(rfcno, container) {

  var xhr = new XMLHttpRequest();
  xhr.open("GET", "https://tools.ietf.org/draft/rfc" + rfcno + "/state.xml", true);
  xhr.onload = function (e) {
    if (xhr.readyState === 4) {
      if (xhr.status === 200) {
        var doc = xhr.responseXML;
        var info = getChildByName(doc.documentElement, "info");
  
        var cont = document.getElementById(container);
        // empty the container
        while (cont.firstChild) {
          cont.removeChild(myNode.firstChild);
        }      
  
        var c = getChildByName(info, "stdstatus");
        if (c !== null) {
          var bld = newElementWithText("b", c.textContent);
          cont.appendChild(bld);
        }
  
        c = getChildByName(info, "updatedby");
        if (c !== null) {
          cont.appendChild(newElement("br"));
          cont.appendChild(newText("Updated by: "));
          appendRfcLinks(cont, c.textContent);
        }
  
        c = getChildByName(info, "obsoletedby");
        if (c !== null) {
          cont.appendChild(newElement("br"));
          cont.appendChild(newText("Obsoleted by: "));
          appendRfcLinks(cont, c.textContent);
        }
        
        c = getChildByName(info, "errata");
        if (c !== null) {
          var template = "<xsl:call-template name="replace-substring">
              <xsl:with-param name="string" select="$xml2rfc-ext-rfc-errata-uri"/>
              <xsl:with-param name="replace">"</xsl:with-param>
              <xsl:with-param name="by">\"</xsl:with-param>
            </xsl:call-template>";

          cont.appendChild(newElement("br"));
          var link = newElementWithText("a", "errata");
          link.setAttribute("href", template.replace("{rfc}", rfcno));
          var errata = newElementWithText("i", "This document has ");
          errata.appendChild(link);
          errata.appendChild(newText("."));
          cont.appendChild(errata);
        }

        cont.style.display = "block";
      } else {
        console.error(xhr.statusText);
      }
    }
  };
  xhr.onerror = function (e) {
    console.error(xhr.status + " " + xhr.statusText);
  };
  xhr.send(null);
}

// DOM helpers
function newElement(name) {
  return document.createElement(name);
}
function newElementWithText(name, txt) {
  var e = document.createElement(name);
  e.appendChild(newText(txt));
  return e;
}
function newText(text) {
  return document.createTextNode(text);
}

function getChildByName(parent, name) {
  if (parent === null) {
    return null;
  }
  else {
    for (var c = parent.firstChild; c !== null; c = c.nextSibling) {
      if (name == c.nodeName) {
        return c;
      }
    }
    return null;
  }
}

function appendRfcLinks(parent, text) {
  var template = "<xsl:call-template name="replace-substring">
  <xsl:with-param name="string" select="$xml2rfc-ext-rfc-uri"/>
  <xsl:with-param name="replace">"</xsl:with-param>
  <xsl:with-param name="by">\"</xsl:with-param>
</xsl:call-template>";
  var updates = text.split(",");
  for (var i = 0; i &lt; updates.length; i++) {
    var rfc = updates[i].trim();
    if (rfc.substring(0, 3) == "rfc") {
      var no = rfc.substring(3);
      var link = newElement("a");
      link.setAttribute("href", template.replace("{rfc}", no));
      link.appendChild(newText(no));
      parent.appendChild(link);
    } else {
      parent.appendChild(newText(rfc));
    }
    if (i != updates.length - 1) {
      parent.appendChild(newText(", "));
    }
  }
}
</script>
</xsl:if>
<script type="application/javascript">
function anchorRewrite() {
<xsl:text>  map = { </xsl:text>
  <xsl:for-each select="//x:anchor-alias">
    <xsl:text>"</xsl:text>
    <xsl:call-template name="replace-substring">
      <xsl:with-param name="string" select="@value"/>
      <xsl:with-param name="replace">"</xsl:with-param>
      <xsl:with-param name="by">\"</xsl:with-param>
    </xsl:call-template>
    <xsl:text>": "</xsl:text>
    <xsl:call-template name="replace-substring">
      <xsl:with-param name="string" select="ancestor::*[@anchor][1]/@anchor"/>
      <xsl:with-param name="replace">"</xsl:with-param>
      <xsl:with-param name="by">\"</xsl:with-param>
    </xsl:call-template>
    <xsl:text>"</xsl:text>
    <xsl:if test="position()!=last()">, </xsl:if>
  </xsl:for-each>
<xsl:text>};</xsl:text>
  if (window.location.hash.length >= 1) {
    var fragid = window.location.hash.substr(1);
    if (fragid) {
      if (! document.getElementById(fragid)) {
        var prefix = "<xsl:value-of select="$anchor-pref"/>";
        var mapped = map[fragid];
        if (mapped) {
          window.location.hash = mapped;
        } else if (fragid.indexOf("section-") == 0) {
          window.location.hash = prefix + "section." + fragid.substring(8);
        } else if (fragid.indexOf("appendix-") == 0) {
          window.location.hash = prefix + "section." + fragid.substring(9);
        } else if (fragid.indexOf("s-") == 0) {
          var postfix = fragid.substring(2);
          if (postfix.startsWith("abstract")) {
            window.location.hash = prefix + postfix;
          } else if (postfix.startsWith("note-")) {
            window.location.hash = prefix + "note." + postfix.substring(5);
          } else {
            window.location.hash = prefix + "section." + postfix;
          }
        } else if (fragid.indexOf("p-") == 0) {
          var r = fragid.substring(2);
          var p = r.indexOf("-");
          if (p >= 0) {
            window.location.hash = prefix + "section." + r.substring(0, p) + ".p." + r.substring(p + 1);
          }
        }
      }
    }  
  }
}
window.addEventListener('hashchange', anchorRewrite);
window.addEventListener('DOMContentLoaded', anchorRewrite);
</script><xsl:if test="$prettyprint-script!=''">
<script src="{$prettyprint-script}"/></xsl:if>
</xsl:template>

<!-- insert CSS style info -->

<xsl:template name="insertCss">
<style type="text/css" title="rfc2629.xslt">
<xsl:value-of select="$xml2rfc-ext-webfonts"/>
a {
  text-decoration: none;
}
a.smpl {
  color: black;
}
a:hover {
  text-decoration: underline;
}
a:active {
  text-decoration: underline;
}
address {
  margin-top: 1em;
  margin-left: 2em;
  font-style: normal;
}<xsl:if test="//x:blockquote|//blockquote">
blockquote {
  border-style: solid;
  border-color: gray;
  border-width: 0 0 0 .25em;
  font-style: italic;
  padding-left: 0.5em;
}</xsl:if>
body {<xsl:if test="$xml2rfc-background!=''">
  background: url(<xsl:value-of select="$xml2rfc-background" />) #ffffff left top;</xsl:if>
  color: black;
  font-family: <xsl:value-of select="$xml2rfc-ext-ff-body"/>;
  font-size: 12pt;
  margin: 10px 0px 10px 10px;
}<xsl:if test="$parsedMaxwidth!=''">
@media screen and (min-width: <xsl:value-of select="number($parsedMaxwidth + 40)"/>px) {
  body {
    margin: 10px auto;
    max-width: <xsl:value-of select="$parsedMaxwidth"/>px;
  }
}</xsl:if>
samp, span.tt, code, pre {
  font-family: <xsl:value-of select="$xml2rfc-ext-ff-pre"/>;
}<xsl:if test="//xhtml:p">
br.p {
  line-height: 150%;
}</xsl:if>
cite {
  font-style: normal;
}<xsl:if test="//x:note|//aside">
aside {
  margin-left: 2em;
}</xsl:if>
dl {
  margin-left: 2em;
}
dl > dt {
  float: left;
  margin-right: 1em;
}
dl.nohang > dt {
  float: none;
}
dl > dd {
  margin-bottom: .5em;
}
dl.compact > dd {
  margin-bottom: .0em;
}
dl > dd > dl {
  margin-top: 0.5em;
}
ul.empty {<!-- spacing between two entries in definition lists -->
  list-style-type: none;
}
ul.empty li {
  margin-top: .5em;
}
dl p {
  margin-left: 0em;
}
dl.<xsl:value-of select="$css-reference"/> > dt {
  font-weight: bold;
}
dl.<xsl:value-of select="$css-reference"/> > dd {
  margin-left: <xsl:choose><xsl:when test="$xml2rfc-symrefs='no'">3.5</xsl:when><xsl:otherwise>6</xsl:otherwise></xsl:choose>em;
}
h1 {
  color: green;
  font-size: 150%;
  line-height: 18pt;
  font-weight: bold;
  text-align: center;
  margin-top: 36pt;
  margin-bottom: 0pt;
}
h2 {
  font-size: 130%;
  line-height: 21pt;
  page-break-after: avoid;
}
h2.np {
  page-break-before: always;
}
h3 {
  font-size: 120%;
  line-height: 15pt;
  page-break-after: avoid;
}
h4 {
  font-size: 110%;
  page-break-after: avoid;
}
h5, h6 {
  page-break-after: avoid;
}
h1 a, h2 a, h3 a, h4 a, h5 a, h6 a {
  color: black;
}
img {
  margin-left: 3em;
}
li {
  margin-left: 2em;
}
ol {
  margin-left: 2em;
}
ol.la {
  list-style-type: lower-alpha;
}
ol.ua {
  list-style-type: upper-alpha;
}
ol p {
  margin-left: 0em;
}<xsl:if test="//xhtml:q">
q {
  font-style: italic;
}</xsl:if>
p {
  margin-left: 2em;
}
pre {
  font-size: 11pt;
  margin-left: 3em;
  background-color: lightyellow;
  padding: .25em;
  page-break-inside: avoid;
}<xsl:if test="//artwork[@x:is-code-component='yes']"><!-- support "<CODE BEGINS>" and "<CODE ENDS>" markers-->
pre.ccmarker {
  background-color: white;
  color: gray;
}
pre.ccmarker > span {
  font-size: small;
}
pre.cct {
  margin-bottom: -1em;
}
pre.ccb {
  margin-top: -1em;
}</xsl:if>
pre.text2 {
  border-style: dotted;
  border-width: 1px;
  background-color: #f0f0f0;
}
pre.inline {
  background-color: white;
  padding: 0em;
  page-break-inside: auto;<xsl:if test="$prettyprint-script!=''">
  border: none !important;</xsl:if>
}
pre.text {
  border-style: dotted;
  border-width: 1px;
  background-color: #f8f8f8;
}
pre.drawing {
  border-style: solid;
  border-width: 1px;
  background-color: #f8f8f8;
  padding: 2em;
}<xsl:if test="//x:q">
q {
  font-style: italic;
}</xsl:if>
<xsl:if test="//x:sup|sup">
sup {
  font-size: 60%;
}</xsl:if><xsl:if test="sub">
sub {
  font-size: 60%;
}</xsl:if>
table {
  margin-left: 2em;
}<xsl:if test="//texttable|//table">
div.<xsl:value-of select="$css-tt"/> {
  margin-left: 2em;
} 
table.<xsl:value-of select="$css-tt"/> {
  border-collapse: collapse;
  border-color: gray;
  border-spacing: 0; 
  vertical-align: top;
 }
table.<xsl:value-of select="$css-tt"/> th {
  border-color: gray;
  padding: 3px;
}
table.<xsl:value-of select="$css-tt"/> td {
  border-color: gray;
  padding: 3px;
}
table.all {
  border-style: solid;
  border-width: 2px;
}
table.full {
  border-style: solid;
  border-width: 2px;
}
table.<xsl:value-of select="$css-tt"/> td {
  vertical-align: top;
}
table.all td {
  border-style: solid;
  border-width: 1px;
}
table.full td {
  border-style: none solid;
  border-width: 1px;
}
table.<xsl:value-of select="$css-tt"/> th {
  vertical-align: top;
}
table.all th {
  border-style: solid;
  border-width: 1px;
}
table.full th {
  border-style: solid;
  border-width: 1px 1px 2px 1px;
}
table.headers th {
  border-style: none none solid none;
  border-width: 2px;
}
table.<xsl:value-of select="$css-tleft"/> {
  margin-right: auto;
}
table.<xsl:value-of select="$css-tright"/> {
  margin-left: auto;
}
table.<xsl:value-of select="$css-tcenter"/> {
  margin-left: auto;
  margin-right: auto;
}
caption {
  caption-side: bottom;
  font-weight: bold;
  font-size: 10pt;
  margin-top: .5em;
}
<xsl:if test="//@x:caption-side">
caption.caption-top {
  caption-side: top;
}
</xsl:if>
<xsl:if test="//table">
table:not([class]) th {
  background-color: #e9e9e9;
}
table:not([class]) tr:nth-child(2n) > td {
  background-color: #f5f5f5;
}
tr p {
  margin-left: 0em;
}
tr pre {
  margin-left: 1em;
}
tr ol {
  margin-left: 1em;
}
tr ul {
  margin-left: 1em;
}
tr dl {
  margin-left: 1em;
}
</xsl:if>
</xsl:if>
table.<xsl:value-of select="$css-header"/> {
  border-spacing: 1px;
  width: 95%;
  font-size: 11pt;
  color: white;
}
td.top {
  vertical-align: top;
}
td.topnowrap {
  vertical-align: top;
  white-space: nowrap;
}
table.<xsl:value-of select="$css-header"/> td {
  background-color: gray;
  width: 50%;
}<xsl:if test="/rfc/@obsoletes | /rfc/@updates">
table.<xsl:value-of select="$css-header"/> a {
  color: white;
}</xsl:if>
ul.toc, ul.toc ul {
  list-style: none;
  margin-left: 1.5em;
  padding-left: 0em;
}
ul.toc li {
  line-height: 150%;
  font-weight: bold;
  margin-left: 0em;
}
ul.toc li li {
  line-height: normal;
  font-weight: normal;
  font-size: 11pt;
  margin-left: 0em;
}
li.excluded {
  font-size: 0pt;
}
ul p {
  margin-left: 0em;
}
.filename, h1, h2, h3, h4 {
  font-family: <xsl:value-of select="$xml2rfc-ext-ff-title"/>;
}
<xsl:if test="$has-index">ul.ind, ul.ind ul {
  list-style: none;
  margin-left: 1.5em;
  padding-left: 0em;
  page-break-before: avoid;
}
ul.ind li {
  font-weight: bold;
  line-height: 200%;
  margin-left: 0em;
}
ul.ind li li {
  font-weight: normal;
  line-height: 150%;
  margin-left: 0em;
}<xsl:if test="//svg:svg">
@namespace svg url(http://www.w3.org/2000/svg);
svg|svg {
  margin-left: 3em;
}
svg {
  margin-left: 3em;
}</xsl:if>
.avoidbreakinside {
  page-break-inside: avoid;
}
.avoidbreakafter {
  page-break-after: avoid;
}
</xsl:if><xsl:if test="//*[@removeInRFC='true']">.rfcEditorRemove div:first-of-type {
  font-style: italic;
}</xsl:if><xsl:if test="//x:bcp14|//bcp14">.bcp14 {
  font-style: normal;
  text-transform: lowercase;
  font-variant: small-caps;
}</xsl:if><xsl:if test="//x:blockquote|//blockquote">
blockquote > * .bcp14 {
  font-style: italic;
}</xsl:if>
.comment {
  background-color: yellow;
}<xsl:if test="$xml2rfc-editing='yes'">
.editingmark {
  background-color: khaki;
}</xsl:if>
.<xsl:value-of select="$css-center"/> {
  text-align: center;
}
.<xsl:value-of select="$css-error"/> {
  color: red;
  font-style: italic;
  font-weight: bold;
}
.figure {
  font-weight: bold;
  text-align: center;
  font-size: 10pt;
}
.filename {
  color: #333333;
  font-size: 112%;
  font-weight: bold;
  line-height: 21pt;
  text-align: center;
  margin-top: 0pt;
}
.fn {
  font-weight: bold;
}
.<xsl:value-of select="$css-left"/> {
  text-align: left;
}
.<xsl:value-of select="$css-right"/> {
  text-align: right;
}
.warning {
  font-size: 130%;
  background-color: yellow;
}<xsl:if test="$xml2rfc-ext-paragraph-links='yes'">
.self {
    color: #999999;
    margin-left: .3em;
    text-decoration: none;
    visibility: hidden;
    -webkit-user-select: none;<!-- not std CSS yet--> 
    -moz-user-select: none;
    -ms-user-select: none;
}
.self:hover {
    text-decoration: none;
}
li:hover > a.self, p:hover > a.self {
    visibility: visible;
}</xsl:if><xsl:if test="$has-edits">del {
  color: red;
  text-decoration: line-through;
}
.del {
  color: red;
  text-decoration: line-through;
}
ins {
  color: green;
  text-decoration: underline;
}
.ins {
  color: green;
  text-decoration: underline;
}
div.issuepointer {
  float: left;
}</xsl:if><xsl:if test="//ed:issue">
table.openissue {
  background-color: khaki;
  border-width: thin;
  border-style: solid;
  border-color: black;
}
table.closedissue {
  background-color: white;
  border-width: thin;
  border-style: solid;
  border-color: gray;
  color: gray;
}
thead th {
  text-align: left;
}
.bg-issue {
  border: solid;
  border-width: 1px;
  font-size: 8pt;
}
.closed-issue {
  border: solid;
  border-width: thin;
  background-color: lime;
  font-size: smaller;
  font-weight: bold;
}
.open-issue {
  border: solid;
  border-width: thin;
  background-color: red;
  font-size: smaller;
  font-weight: bold;
}
.editor-issue {
  border: solid;
  border-width: thin;
  background-color: yellow;
  font-size: smaller;
  font-weight: bold;
}</xsl:if><xsl:if test="$xml2rfc-ext-refresh-from!=''">.refreshxmlerror {
  position: fixed;
  top: 1%;
  right: 1%;
  padding: 5px 5px;
  color: yellow;
  background: black;
}
.refreshbrowsererror {
  position: fixed;
  top: 1%;
  left: 1%;
  padding: 5px 5px;
  color: red;
  background: black;
}</xsl:if><xsl:if test="/rfc/x:feedback">.<xsl:value-of select="$css-feedback"/> {
  position: fixed;
  bottom: 1%;
  right: 1%;
  padding: 3px 5px;
  color: white;
  border-radius: 5px;
  background: #006400;
  border: 1px solid silver;
  -webkit-user-select: none;<!-- not std CSS yet--> 
  -moz-user-select: none;
  -ms-user-select: none;
}
.<xsl:value-of select="$css-fbbutton"/> {
  margin-left: 1em;
  color: #303030;
  font-size: small;
  font-weight: normal;
  background: #d0d000;
  padding: 1px 4px;
  border: 1px solid silver;
  border-radius: 5px;
  -webkit-user-select: none;<!-- not std CSS yet--> 
  -moz-user-select: none;
  -ms-user-select: none;
}</xsl:if><xsl:if test="$xml2rfc-ext-justification='always'">
dd, li, p {
  text-align: justify;
}</xsl:if><xsl:if test="$xml2rfc-ext-insert-metadata='yes' and $rfcno!=''">
.<xsl:value-of select="$css-docstatus"/> {
  border: 1px solid black;
  display: none;
  float: right;
  margin: 2em;
  padding: 1em;
  -webkit-user-select: none;<!-- not std CSS yet--> 
  -moz-user-select: none;
  -ms-user-select: none;
}</xsl:if><xsl:if test="$errata-parsed">
.<xsl:value-of select="$css-erratum"/> {
  border: 1px solid orangered;
  border-left: 0.75em solid orangered;
  float: right;
  padding: 0.5em;
  -webkit-user-select: none;<!-- not std CSS yet--> 
  -moz-user-select: none;
  -ms-user-select: none;
}<xsl:if test="$parsedMaxwidth!=''">
@media screen and (min-width: <xsl:value-of select="number($parsedMaxwidth + 350)"/>px) {
  .<xsl:value-of select="$css-erratum"/> {
    margin-right: -150px;
  }
}</xsl:if></xsl:if><xsl:if test="$published-as-rfc">
.<xsl:value-of select="$css-publishedasrfc"/> {
  background-color: yellow;
  color: green;
  font-size: 14pt;
  text-align: center;
}</xsl:if>

@media screen {
  pre.text, pre.text2 {
    width: 69em;
  }
}

@media print {
  .<xsl:value-of select="$css-noprint"/> {
    display: none;
  }

  a {
    color: black;
    text-decoration: none;
  }

  table.<xsl:value-of select="$css-header"/> {
    width: 90%;
  }

  td.<xsl:value-of select="$css-header"/> {
    width: 50%;
    color: black;
    background-color: white;
    vertical-align: top;
    font-size: 110%;
  }

  ul.toc a:last-child::after {
    content: leader('.') target-counter(attr(href), page);
  }

  ul.ind li li a {<!-- links in the leaf nodes of the index should go to page numbers -->
    content: target-counter(attr(href), page);
  }

  pre {
    font-size: 10pt;
  }

  .print2col {
    column-count: 2;
    -moz-column-count: 2;<!-- for Firefox -->
    column-fill: auto;<!-- for PrinceXML -->
  }
<xsl:if test="$xml2rfc-ext-justification='print'">
  dd, li, p {
    text-align: justify;
  }
</xsl:if>}
@page<xsl:if test="$xml2rfc-ext-duplex='yes'">:right</xsl:if> {
  font-family: <xsl:value-of select="$xml2rfc-ext-ff-body"/>;
  @top-left {
       content: "<xsl:call-template name="get-header-left"/>";
  }
  @top-right {
       content: "<xsl:call-template name="get-header-right"/>";
  }
  @top-center {
       content: "<xsl:call-template name="get-header-center"/>";
  }
  @bottom-left {
       content: "<xsl:call-template name="get-author-summary"/>";
  }
  @bottom-center {
       content: "<xsl:call-template name="get-bottom-center"/>";
  }
  @bottom-right {
       content: "[Page " counter(page) "]";
  }
}<xsl:if test="$xml2rfc-ext-duplex='yes'">
@page:left {
  font-family: <xsl:value-of select="$xml2rfc-ext-ff-body"/>;
  @top-left {
       content: "<xsl:call-template name="get-header-right"/>";
  }
  @top-right {
       content: "<xsl:call-template name="get-header-left"/>";
  }
  @top-center {
       content: "<xsl:call-template name="get-header-center"/>";
  }
  @bottom-left {
       content: "[Page " counter(page) "]";
  }
  @bottom-center {
       content: "<xsl:call-template name="get-bottom-center"/>";
  }
  @bottom-right {
       content: "<xsl:call-template name="get-author-summary"/>";
  }
}
</xsl:if>
@page:first {
    @top-left {
      content: normal;
    }
    @top-right {
      content: normal;
    }
    @top-center {
      content: normal;
    }
}
</style>
</xsl:template>


<!-- generate the index section -->

<xsl:template name="insertSingleIref">
  <xsl:choose>
    <xsl:when test="@ed:xref">
      <!-- special index generator mode -->
      <xsl:text>[</xsl:text>
      <a href="#{@ed:xref}"><xsl:value-of select="@ed:xref"/></a>
      <xsl:text>, </xsl:text>
      <a>
        <xsl:variable name="htmluri" select="//reference[@anchor=current()/@ed:xref]/format[@type='HTML']/@target"/>
        <xsl:if test="$htmluri">
          <xsl:attribute name="href"><xsl:value-of select="concat($htmluri,'#',@ed:frag)"/></xsl:attribute>
        </xsl:if>
        <xsl:choose>
          <xsl:when test="@primary='true'"><b><xsl:value-of select="@ed:label" /></b></xsl:when>
          <xsl:otherwise><xsl:value-of select="@ed:label" /></xsl:otherwise>
        </xsl:choose>
      </a>
      <xsl:text>]</xsl:text>
      <xsl:if test="position()!=last()">, </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="_n">
        <xsl:call-template name="get-section-number" />
      </xsl:variable>
      <xsl:variable name="n">
        <xsl:choose>
          <xsl:when test="$_n!=''">
            <xsl:value-of select="$_n"/>
          </xsl:when>
          <xsl:otherwise>&#167;</xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <xsl:variable name="backlink">
        <xsl:choose>
          <xsl:when test="self::xref">
            <xsl:variable name="target" select="@target"/>
            <xsl:comment>workaround for Saxon 9.1 bug; force evaluation of: <xsl:value-of select="$target"/></xsl:comment>
            <xsl:variable name="no"><xsl:number level="any" count="xref[@target=$target]"/></xsl:variable>
            <xsl:text>#</xsl:text>
            <xsl:value-of select="$anchor-pref"/>
            <xsl:text>xref.</xsl:text>
            <xsl:value-of select="@target"/>
            <xsl:text>.</xsl:text>
            <xsl:value-of select="$no"/>
          </xsl:when>
          <xsl:when test="self::iref">
            <xsl:text>#</xsl:text>
            <xsl:call-template name="compute-iref-anchor"/>
          </xsl:when>
          <xsl:when test="self::x:ref">
            <xsl:text>#</xsl:text>
            <xsl:call-template name="compute-extref-anchor"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:message>Unsupported element type for insertSingleIref</xsl:message>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <a href="{$backlink}">
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:choose>
          <xsl:when test="@primary='true'"><b><xsl:value-of select="$n"/></b></xsl:when>
          <xsl:otherwise><xsl:value-of select="$n"/></xsl:otherwise>
        </xsl:choose>
      </a>
      <xsl:if test="position()!=last()">, </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="insertSingleXref">
  <xsl:variable name="_n">
    <xsl:call-template name="get-section-number" />
  </xsl:variable>
  <xsl:variable name="n">
    <xsl:choose>
      <xsl:when test="$_n!=''">
        <xsl:value-of select="$_n"/>
      </xsl:when>
      <xsl:otherwise>&#167;</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="self::reference">
      <a href="#{@anchor}">
        <xsl:call-template name="insertInsDelClass"/>
        <b><xsl:value-of select="$n"/></b>
      </a>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="target" select="@target"/>
      <xsl:variable name="backlink">#<xsl:value-of select="$anchor-pref"/>xref.<xsl:value-of select="$target"/>.<xsl:number level="any" count="xref[@target=$target]"/></xsl:variable>
      <a href="{$backlink}">
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:value-of select="$n"/>
      </a>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:if test="position()!=last()">, </xsl:if>
</xsl:template>

<xsl:template name="insertIndex">

  <xsl:call-template name="insert-conditional-hrule"/>

  <section id="{$anchor-pref}index">
    <xsl:call-template name="insert-conditional-pagebreak"/>
    <h2>
      <a href="#{$anchor-pref}index">Index</a>
    </h2>

    <!-- generate navigation links to index subsections -->
    <p class="{$css-noprint}">
      <xsl:variable name="irefs" select="//iref[generate-id(.) = generate-id(key('index-first-letter',translate(substring(@item,1,1),$lcase,$ucase))[1])]"/>
      <xsl:variable name="xrefs" select="//reference[not(starts-with(@anchor,'deleted-'))][generate-id(.) = generate-id(key('index-first-letter',translate(substring(concat(/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),1,1),$lcase,$ucase))[1])]"/>
  
      <xsl:for-each select="$irefs | $xrefs">
      
        <xsl:sort select="translate(concat(@item,/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),$lcase,$ucase)" />
  
        <xsl:variable name="letter" select="translate(substring(concat(@item,/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),1,1),$lcase,$ucase)"/>
  
        <!-- character? -->
        <xsl:if test="translate($letter,concat($lcase,$ucase,'0123456789'),'')=''">
  
          <xsl:variable name="showit" select="$xml2rfc-ext-include-references-in-index='yes' or $irefs[starts-with(translate(@item,$lcase,$ucase),$letter)]"/>
  
          <xsl:if test="$showit">
            <a href="#{$anchor-pref}index.{$letter}">
              <xsl:value-of select="$letter" />
            </a>
            <xsl:text> </xsl:text>
          </xsl:if>
        </xsl:if>
      </xsl:for-each>
    </p>

    <!-- for each index subsection -->
    <div class="print2col">
      <ul class="ind">
        <xsl:variable name="irefs2" select="//iref[generate-id(.) = generate-id(key('index-first-letter',translate(substring(@item,1,1),$lcase,$ucase))[1])]"/>
        <xsl:variable name="xrefs2" select="//reference[not(starts-with(@anchor,'deleted-'))][generate-id(.) = generate-id(key('index-first-letter',translate(substring(concat(/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),1,1),$lcase,$ucase))[1])]"/>
    
        <xsl:for-each select="$irefs2 | $xrefs2">
          <xsl:sort select="translate(concat(@item,/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),$lcase,$ucase)" />
          <xsl:variable name="letter" select="translate(substring(concat(@item,/rfc/back/displayreference[@target=current()/@anchor]/@to,@anchor),1,1),$lcase,$ucase)"/>
    
          <xsl:variable name="showit" select="$xml2rfc-ext-include-references-in-index='yes' or $irefs2[starts-with(translate(@item,$lcase,$ucase),$letter)]"/>
    
          <xsl:if test="$showit">
            <li>
    
              <!-- make letters and digits stand out -->
              <xsl:choose>
                <xsl:when test="translate($letter,concat($lcase,$ucase,'0123456789'),'')=''">
                  <a id="{$anchor-pref}index.{$letter}" href="#{$anchor-pref}index.{$letter}">
                    <b><xsl:value-of select="$letter" /></b>
                  </a>
                </xsl:when>
                <xsl:otherwise>
                  <b><xsl:value-of select="$letter" /></b>
                </xsl:otherwise>
              </xsl:choose>
    
              <ul>
                <xsl:for-each select="key('index-first-letter',translate(substring(concat(@item,@anchor),1,1),$lcase,$ucase))">
    
                  <xsl:sort select="translate(concat(@item,@anchor),$lcase,$ucase)" />
    
                  <xsl:choose>
                    <xsl:when test="self::reference">
                      <xsl:if test="$xml2rfc-ext-include-references-in-index='yes' and not(starts-with(@anchor,'deleted-'))">
                        <li>
                          <xsl:variable name="val">
                            <xsl:call-template name="reference-name"/>
                          </xsl:variable>
                          <em>
                            <xsl:value-of select="substring($val,2,string-length($val)-2)"/>
                          </em>
                          <xsl:text>&#160;&#160;</xsl:text>
    
                          <xsl:variable name="rs" select="key('xref-item',current()/@anchor) | . | key('anchor-item',concat('deleted-',current()/@anchor))"/>
    
                          <xsl:for-each select="$rs">
                            <xsl:call-template name="insertSingleXref" />
                          </xsl:for-each>
    
                          <xsl:variable name="rs2" select="$rs[@x:sec|@section]"/>
    
                          <xsl:if test="$rs2">
                            <ul>
                              <xsl:for-each select="$rs2">
                                <xsl:sort select="substring-before(concat(@x:sec,@section,'.'),'.')" data-type="number"/>
                                <xsl:sort select="substring(concat(@x:sec,@section),2+string-length(substring-before(concat(@x:sec,@section),'.')))" data-type="number"/>
    
                                <xsl:if test="generate-id(.) = generate-id(key('index-xref-by-sec',concat(@target,'..',@x:sec,@section))[1])">
                                  <li>
                                    <em>
                                      <xsl:choose>
                                        <xsl:when test="translate(substring(concat(@x:sec,@section),1,1),$ucase,'')=''">
                                          <xsl:text>Appendix </xsl:text>
                                        </xsl:when>
                                        <xsl:otherwise>
                                          <xsl:text>Section </xsl:text>
                                        </xsl:otherwise>
                                      </xsl:choose>
                                      <xsl:value-of select="@x:sec|@section"/>
                                    </em>
                                    <xsl:text>&#160;&#160;</xsl:text>
                                    <xsl:for-each select="key('index-xref-by-sec',concat(@target,'..',@x:sec,@section))">
                                      <xsl:call-template name="insertSingleXref" />
                                    </xsl:for-each>
                                  </li>
                                </xsl:if>
                              </xsl:for-each>
                            </ul>
                          </xsl:if>
    
                          <xsl:if test="current()/x:source/@href">
                            <xsl:variable name="rs3" select="$rs[not(@x:sec) and @x:rel]"/>
                            <xsl:variable name="doc" select="document(current()/x:source/@href)"/>
                            <xsl:if test="$rs3">
                              <ul>
                                <xsl:for-each select="$rs3">
                                  <xsl:sort select="count($doc//*[@anchor and following::*/@anchor=substring-after(current()/@x:rel,'#')])" order="ascending" data-type="number"/>
                                  <xsl:if test="generate-id(.) = generate-id(key('index-xref-by-anchor',concat(@target,'..',@x:rel))[1])">
                                    <li>
                                      <em>
                                        <xsl:variable name="sec">
                                          <xsl:for-each select="$doc//*[@anchor=substring-after(current()/@x:rel,'#')]">
                                            <xsl:call-template name="get-section-number"/>
                                          </xsl:for-each>
                                        </xsl:variable>
                                        <xsl:choose>
                                          <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">
                                            <xsl:text>Appendix </xsl:text>
                                          </xsl:when>
                                          <xsl:otherwise>
                                            <xsl:text>Section </xsl:text>
                                          </xsl:otherwise>
                                        </xsl:choose>
                                        <xsl:value-of select="$sec"/>
                                      </em>
                                      <xsl:text>&#160;&#160;</xsl:text>
                                      <xsl:for-each select="key('index-xref-by-anchor',concat(@target,'..',@x:rel))">
                                        <xsl:call-template name="insertSingleXref" />
                                      </xsl:for-each>
                                    </li>
                                  </xsl:if>
                                </xsl:for-each>
                              </ul>
                            </xsl:if>
                          </xsl:if>
                        </li>
                      </xsl:if>
                    </xsl:when>
                    <xsl:otherwise>
                      <!-- regular iref -->
                      <xsl:if test="generate-id(.) = generate-id(key('index-item',concat(@item,@anchor))[1])">
                        <xsl:variable name="item" select="@item"/>
                        <xsl:variable name="in-artwork" select="key('index-item',$item)[@primary='true' and ancestor::artwork]"/>
    
                        <li>
                          <xsl:choose>
                            <xsl:when test="$in-artwork">
                              <span class="tt"><xsl:value-of select="@item" /></span>
                            </xsl:when>
                            <xsl:otherwise>
                              <xsl:value-of select="@item" />
                            </xsl:otherwise>
                          </xsl:choose>
                          <xsl:text>&#160;&#160;</xsl:text>
    
                          <xsl:variable name="irefs3" select="key('index-item',@item)[not(@subitem) or @subitem='']"/>
                          <xsl:variable name="xrefs3" select="key('xref-item',$irefs3[@x:for-anchor='']/../@anchor) | key('xref-item',$irefs3/@x:for-anchor)"/>
                          <xsl:variable name="extrefs3" select="key('extref-item',$irefs3[@x:for-anchor='']/../@anchor) | key('extref-item',$irefs3/@x:for-anchor)"/>
    
                          <xsl:for-each select="$irefs3|$xrefs3|$extrefs3">
                            <!-- <xsl:sort select="translate(@item,$lcase,$ucase)" />  -->
                            <xsl:call-template name="insertSingleIref" />
                          </xsl:for-each>
    
                          <xsl:variable name="s2" select="key('index-item',@item)[@subitem and @subitem!='']"/>
                          <xsl:if test="$s2">
                            <ul>
                              <xsl:for-each select="$s2">
                                <xsl:sort select="translate(@subitem,$lcase,$ucase)" />
    
                                <xsl:if test="generate-id(.) = generate-id(key('index-item-subitem',concat(@item,'..',@subitem))[1])">
    
                                  <xsl:variable name="in-artwork2" select="key('index-item-subitem',concat(@item,'..',@subitem))[@primary='true' and ancestor::artwork]" />
    
                                  <li>
    
                                    <xsl:choose>
                                      <xsl:when test="$in-artwork2">
                                        <span class="tt"><xsl:value-of select="@subitem" /></span>
                                      </xsl:when>
                                      <xsl:otherwise>
                                        <xsl:value-of select="@subitem" />
                                      </xsl:otherwise>
                                    </xsl:choose>
                                    <xsl:text>&#160;&#160;</xsl:text>
    
                                    <xsl:variable name="irefs4" select="key('index-item-subitem',concat(@item,'..',@subitem))"/>
                                    <xsl:variable name="xrefs4" select="key('xref-item',$irefs4[@x:for-anchor='']/../@anchor) | key('xref-item',$irefs4/@x:for-anchor)"/>
                                    <xsl:variable name="extrefs4" select="key('extref-item',$irefs4[@x:for-anchor='']/../@anchor) | key('extref-item',$irefs4/@x:for-anchor)"/>
    
                                    <xsl:for-each select="$irefs4|$xrefs4|$extrefs4">
                                      <!--<xsl:sort select="translate(@item,$lcase,$ucase)" />-->
                                      <xsl:call-template name="insertSingleIref" />
                                    </xsl:for-each>
    
                                  </li>
                                </xsl:if>
                              </xsl:for-each>
                            </ul>
                          </xsl:if>
                        </li>
                      </xsl:if>
                    </xsl:otherwise>
                  </xsl:choose>
    
    
                </xsl:for-each>
              </ul>
            </li>
          </xsl:if>
    
        </xsl:for-each>
      </ul>
    </div>
  </section>
</xsl:template>

<xsl:template name="insertPreamble" myns:namespaceless-elements="xml2rfc">

  <xsl:param name="notes"/>

<boilerplate>
  <!-- TLP4, Section 6.c.iii -->
  <xsl:variable name="pre5378EscapeClause">
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      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="string-length(translate($number,'.ABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890&#167;','.'))"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <!-- handle tocdepth parameter -->
  <xsl:choose>
    <xsl:when test="(not($tocparam) or $tocparam='' or $tocparam='default') and $depth >= $parsedTocDepth">
      <!-- dropped entry because excluded -->
      <xsl:attribute name="class">excluded</xsl:attribute>
    </xsl:when>
    <xsl:when test="$tocparam='exclude'">
      <!-- dropped entry because excluded -->
      <xsl:attribute name="class">excluded</xsl:attribute>
    </xsl:when>
    <xsl:otherwise>
      <xsl:choose>
        <xsl:when test="starts-with($number,'del-')">
          <del>
            <xsl:value-of select="$number" />
            <a href="#{$target}"><xsl:value-of select="$title"/></a>
          </del>
        </xsl:when>
        <xsl:otherwise>
          <xsl:if test="$number != '' and not(contains($number,'unnumbered-'))">
            <a href="#{$anchor-pref}section.{$number}">
              <xsl:call-template name="emit-section-number">
                <xsl:with-param name="no" select="$number"/>
              </xsl:call-template>
            </a>
            <xsl:text>&#160;&#160;&#160;</xsl:text>
          </xsl:if>
          <a href="#{$target}">
            <xsl:choose>
              <xsl:when test="$waschanged!=''">
                <ins><xsl:value-of select="$title"/></ins>
                <del><xsl:value-of select="$oldtitle"/></del>
              </xsl:when>
              <xsl:when test="$name">
                <xsl:call-template name="render-name-ref">
                  <xsl:with-param name="n" select="$name/node()"/>
                </xsl:call-template>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="$title"/>
              </xsl:otherwise>
            </xsl:choose>
          </a>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="back-toc">

  <xsl:if test="//cref and $xml2rfc-comments='yes' and $xml2rfc-inline!='yes'">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-pref,'comments')"/>
        <xsl:with-param name="title" select="'Editorial Comments'"/>
      </xsl:call-template>
    </li>
  </xsl:if>

  <xsl:if test="$xml2rfc-ext-authors-section='before-appendices'">
    <xsl:apply-templates select="/rfc/front" mode="toc" />
  </xsl:if>
  <xsl:apply-templates select="back/*[not(self::references)]" mode="toc" />

  <!-- insert the index if index entries exist -->
  <xsl:if test="$has-index">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-pref,'index')"/>
        <xsl:with-param name="title" select="'Index'"/>
      </xsl:call-template>
    </li>
  </xsl:if>

  <xsl:if test="$xml2rfc-ext-authors-section='end'">
    <xsl:apply-templates select="/rfc/front" mode="toc" />
  </xsl:if>

  <!-- copyright statements -->
  <xsl:if test="$xml2rfc-private='' and not($no-copylong)">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-pref,'ipr')"/>
        <xsl:with-param name="title" select="'Intellectual Property and Copyright Statements'"/>
      </xsl:call-template>
    </li>
  </xsl:if>

</xsl:template>

<xsl:template match="front" mode="toc">

  <xsl:variable name="authors-title">
    <xsl:call-template name="get-authors-section-title"/>
  </xsl:variable>
  <xsl:variable name="authors-number">
    <xsl:call-template name="get-authors-section-number"/>
  </xsl:variable>

  <xsl:if test="$authors-number!='suppress' and $xml2rfc-authorship!='no'">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-pref,'authors')"/>
        <xsl:with-param name="title" select="$authors-title"/>
        <xsl:with-param name="number" select="$authors-number"/>
      </xsl:call-template>
    </li>
  </xsl:if>

</xsl:template>

<xsl:template name="references-toc">

  <!-- distinguish two cases: (a) single references element (process
  as toplevel section; (b) multiple references sections (add one toplevel
  container with subsection) -->

  <xsl:variable name="refsecs" select="/rfc/back/references|/rfc/back/ed:replace/ed:ins/references"/>

  <xsl:choose>
    <xsl:when test="count($refsecs) = 0">
      <!-- nop -->
    </xsl:when>
    <xsl:when test="count($refsecs) = 1">
      <xsl:for-each select="$refsecs">
        <xsl:variable name="title">
          <xsl:choose>
            <xsl:when test="@title!=''"><xsl:value-of select="@title" /></xsl:when>
            <xsl:otherwise><xsl:value-of select="$xml2rfc-refparent"/></xsl:otherwise>
          </xsl:choose>
        </xsl:variable>

        <li>
          <xsl:call-template name="insert-toc-line">
            <xsl:with-param name="number">
              <xsl:call-template name="get-references-section-number"/>
            </xsl:with-param>
            <xsl:with-param name="target" select="concat($anchor-pref,'references')"/>
            <xsl:with-param name="title" select="$title"/>
            <xsl:with-param name="name" select="name"/>
          </xsl:call-template>
        </li>
      </xsl:for-each>
    </xsl:when>
    <xsl:otherwise>
      <li>
        <!-- insert pseudo container -->
        <xsl:call-template name="insert-toc-line">
          <xsl:with-param name="number">
            <xsl:call-template name="get-references-section-number"/>
          </xsl:with-param>
          <xsl:with-param name="target" select="concat($anchor-pref,'references')"/>
          <xsl:with-param name="title" select="$xml2rfc-refparent"/>
        </xsl:call-template>

        <ul>
          <!-- ...with subsections... -->
          <xsl:for-each select="$refsecs">
            <xsl:variable name="title">
              <xsl:choose>
                <xsl:when test="@title!=''"><xsl:value-of select="@title" /></xsl:when>
                <xsl:otherwise><xsl:value-of select="$xml2rfc-refparent"/></xsl:otherwise>
              </xsl:choose>
            </xsl:variable>

            <xsl:variable name="sectionNumber">
              <xsl:call-template name="get-section-number" />
            </xsl:variable>

            <xsl:variable name="num">
              <xsl:number level="any"/>
            </xsl:variable>

            <li>
              <xsl:call-template name="insert-toc-line">
                <xsl:with-param name="number" select="$sectionNumber"/>
                <xsl:with-param name="target" select="concat($anchor-pref,'references','.',$num)"/>
                <xsl:with-param name="title" select="$title"/>
                <xsl:with-param name="name" select="name"/>
              </xsl:call-template>
            </li>
          </xsl:for-each>
        </ul>
      </li>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="section|appendix" mode="toc">
  <xsl:variable name="sectionNumber">
    <xsl:call-template name="get-section-number" />
  </xsl:variable>

  <xsl:variable name="target">
    <xsl:choose>
      <xsl:when test="@anchor"><xsl:value-of select="@anchor" /></xsl:when>
       <xsl:otherwise><xsl:value-of select="$anchor-pref"/>section.<xsl:value-of select="$sectionNumber" /></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <!-- obtain content, just to check whether we need to recurse at all -->
  <xsl:variable name="content">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="number" select="$sectionNumber"/>
        <xsl:with-param name="target" select="$target"/>
        <xsl:with-param name="title" select="@title"/>
        <xsl:with-param name="name" select="name"/>
        <xsl:with-param name="tocparam" select="@toc"/>
        <xsl:with-param name="oldtitle" select="@ed:old-title"/>
        <xsl:with-param name="waschanged" select="@ed:resolves"/>
      </xsl:call-template>

      <ul>
        <xsl:apply-templates mode="toc" />
      </ul>
    </li>
  </xsl:variable>

  <xsl:if test="$content!=''">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="number" select="$sectionNumber"/>
        <xsl:with-param name="target" select="$target"/>
        <xsl:with-param name="title" select="@title"/>
        <xsl:with-param name="name" select="name"/>
        <xsl:with-param name="tocparam" select="@toc"/>
        <xsl:with-param name="oldtitle" select="@ed:old-title"/>
        <xsl:with-param name="waschanged" select="@ed:resolves"/>
      </xsl:call-template>

      <!-- obtain nested content, just to check whether we need to recurse at all -->
      <xsl:variable name="nested-content">
        <ul>
          <xsl:apply-templates mode="toc" />
        </ul>
      </xsl:variable>

      <!-- only recurse if we need to (do not produce useless list container) -->
      <xsl:if test="$nested-content!=''">
        <ul>
          <xsl:apply-templates mode="toc" />
        </ul>
      </xsl:if>
    </li>
  </xsl:if>
</xsl:template>

<xsl:template match="middle" mode="toc">
  <xsl:apply-templates mode="toc" />
  <xsl:call-template name="references-toc" />
</xsl:template>

<xsl:template match="rfc" mode="toc">
  <xsl:apply-templates select="middle" mode="toc" />
  <xsl:call-template name="back-toc" />
</xsl:template>

<xsl:template match="ed:del|ed:ins|ed:replace" mode="toc">
  <xsl:apply-templates mode="toc" />
</xsl:template>

<xsl:template match="*|text()" mode="toc" />


<xsl:template name="insertTocAppendix">

  <xsl:if test="//figure[@title!='' or @anchor!='']">
    <ul class="toc">
      <li>Figures
        <ul>
          <xsl:for-each select="//figure[@title!='' or @anchor!='']">
            <xsl:variable name="n"><xsl:call-template name="get-figure-number"/></xsl:variable>
            <xsl:variable name="title">
              <xsl:if test="not(starts-with($n,'u'))">
                <xsl:text>Figure </xsl:text>
                <xsl:value-of select="$n"/>
                <xsl:if test="@title!=''">: </xsl:if>
              </xsl:if>
              <xsl:if test="@title"><xsl:value-of select="@title"/></xsl:if>
            </xsl:variable>
            <li>
              <xsl:call-template name="insert-toc-line">
                <xsl:with-param name="target" select="concat($anchor-pref,'figure.',$n)" />
                <xsl:with-param name="title" select="$title" />
              </xsl:call-template>
            </li>
          </xsl:for-each>
        </ul>
      </li>
    </ul>
  </xsl:if>

  <!-- experimental -->
  <xsl:if test="//ed:issue">
    <xsl:call-template name="insertIssuesList" />
  </xsl:if>

</xsl:template>

<xsl:template name="reference-name">
  <xsl:param name="node" select="."/>

  <xsl:for-each select="$node">
    <xsl:choose>
      <xsl:when test="$xml2rfc-symrefs!='no' and ancestor::ed:del">
        <xsl:variable name="unprefixed" select="substring-after(@anchor,'deleted-')"/>
        <xsl:choose>
          <xsl:when test="$unprefixed!=''">
            <xsl:value-of select="concat('[',$unprefixed,']')"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:if test="count(//reference[@anchor=current()/@anchor])!=1">
              <xsl:message>Deleted duplicate anchors should have the prefix "deleted-": <xsl:value-of select="@anchor"/></xsl:message>
            </xsl:if>
            <xsl:value-of select="concat('[',@anchor,']')"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:when>
      <xsl:when test="$xml2rfc-symrefs!='no'">
        <xsl:text>[</xsl:text>
        <xsl:choose>
          <xsl:when test="/rfc/back/displayreference[@target=current()/@anchor]">
            <xsl:value-of select="/rfc/back/displayreference[@target=current()/@anchor]/@to"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="@anchor"/>
          </xsl:otherwise>
        </xsl:choose>
        <xsl:text>]</xsl:text>
      </xsl:when>
      <xsl:when test="ancestor::ed:del">
        <xsl:text>[del]</xsl:text>
      </xsl:when>
      <xsl:otherwise>[<xsl:number level="any" count="reference[not(ancestor::ed:del)]"/>]</xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>



<xsl:template name="replace-substring">
  <xsl:param name="string" />
  <xsl:param name="replace" />
  <xsl:param name="by" />

  <xsl:choose>
    <xsl:when test="contains($string,$replace)">
      <xsl:value-of select="concat(substring-before($string, $replace),$by)" />
      <xsl:call-template name="replace-substring">
        <xsl:with-param name="string" select="substring-after($string,$replace)" />
        <xsl:with-param name="replace" select="$replace" />
        <xsl:with-param name="by" select="$by" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise><xsl:value-of select="$string" /></xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="rfc-or-id-link">
  <xsl:param name="name" />

  <xsl:choose>
    <xsl:when test="starts-with($name,'draft-')">
      <xsl:variable name="uri">
        <xsl:call-template name="compute-internet-draft-uri">
          <xsl:with-param name="internet-draft" select="$name"/>
        </xsl:call-template>
      </xsl:variable>
      <a href="{$uri}"><xsl:value-of select="$name"/></a>
      <xsl:call-template name="check-front-matter-ref">
        <xsl:with-param name="name" select="$name"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="string(number($name))=$name">
      <xsl:variable name="uri">
        <xsl:call-template name="compute-rfc-uri">
          <xsl:with-param name="rfc" select="$name"/>
        </xsl:call-template>
      </xsl:variable>
      <a href="{$uri}"><xsl:value-of select="$name"/></a>
      <xsl:call-template name="check-front-matter-ref">
        <xsl:with-param name="name" select="$name"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$name"/>
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="concat('In metadata obsoletes/updates, RFC number of draft name is expected - found: ',$name)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="rfclist">
  <xsl:param name="list" />
  <xsl:choose>
    <xsl:when test="contains($list,',')">
      <xsl:variable name="rfcNo" select="substring-before($list,',')" />
      <xsl:call-template name="rfc-or-id-link">
        <xsl:with-param name="name" select="$rfcNo"/>
      </xsl:call-template>
      <xsl:text>, </xsl:text>
      <xsl:call-template name="rfclist">
        <xsl:with-param name="list" select="normalize-space(substring-after($list,','))" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="rfcNo" select="$list" />
      <xsl:call-template name="rfc-or-id-link">
        <xsl:with-param name="name" select="$rfcNo"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="check-front-matter-ref">
  <xsl:param name="name"/>
  <xsl:choose>
    <xsl:when test="starts-with($name,'draft-')">
      <xsl:if test="not(//references//reference//seriesInfo[@name='Internet-Draft' and @value=$name])">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg" select="concat('front matter mentions I-D ',$name,' for which there is no reference element')"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:if test="not(//references//reference//seriesInfo[@name='RFC' and @value=$name])">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg" select="concat('front matter mentions RFC ',$name,' for which there is no reference element')"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="check-anchor">
  <xsl:if test="@anchor and @anchor!=''">
    <!-- check validity of anchor name -->
    <xsl:variable name="t" select="@anchor"/>
    <xsl:variable name="tstart" select="substring($t,1,1)"/>

    <!-- we only check for disallowed ASCII characters for now -->
    <xsl:variable name="not-namestartchars">&#9;&#10;&#13;&#32;!"#$%&amp;'()*+,-./0123456789;&lt;=&gt;?@[\]^`[|}~</xsl:variable>

    <xsl:if test="$tstart!=translate($tstart,$not-namestartchars,'')">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('anchor &quot;',$t,'&quot; can not start with character &quot;',$tstart,'&quot;')"/>
      </xsl:call-template>
    </xsl:if>
    <xsl:call-template name="check-anchor-non-start">
      <xsl:with-param name="f" select="$t"/>
      <xsl:with-param name="t" select="$t"/>
    </xsl:call-template>
  </xsl:if>
</xsl:template>

<xsl:template name="check-anchor-non-start">
  <xsl:param name="f"/>
  <xsl:param name="t"/>

  <xsl:variable name="not-namechars">&#9;&#10;&#13;&#32;!"#$%&amp;'()*+,/;&lt;=&gt;?@[\]^`[|}~</xsl:variable>

  <xsl:choose>
    <xsl:when test="$t=''">
      <!-- Done -->
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="s" select="substring($t,1,1)"/>
      <xsl:choose>
        <xsl:when test="$s!=translate($s,$not-namechars,'')">
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="concat('anchor &quot;',$f,'&quot; contains invalid character &quot;',$s,'&quot; at position ',string-length($f) - string-length($t))"/>
          </xsl:call-template>
        </xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="check-anchor-non-start">
            <xsl:with-param name="f" select="$f"/>
            <xsl:with-param name="t" select="substring($t,2)"/>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="sluggy-anchor">
  <xsl:if test="self::section and (not(@anchor) or @anchor='')">
    <xsl:variable name="fr">ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.()+-_ :%,/=@&lt;&gt;</xsl:variable>
    <xsl:variable name="to">abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789.----_---------</xsl:variable>
    <xsl:variable name="canslug" select="translate(normalize-space(concat(@title,name)),$fr,'')=''"/>
    <xsl:if test="$canslug">
      <xsl:variable name="slug" select="translate(normalize-space(concat(@title,name)),$fr,$to)"/>
      <xsl:variable name="conflicts" select="//section[not(@anchor) and $slug=translate(normalize-space(concat(@title,name)),$fr,$to)]"/>
      <xsl:choose>
        <xsl:when test="count($conflicts)>1">
          <xsl:variable name="c" select="preceding::*[not(@anchor) and $slug=translate(normalize-space(concat(@title,name)),$fr,$to)]"/>
          <xsl:value-of select="concat('n-',$slug,'_',(1+count($c)))"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="concat('n-',$slug)"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:if>
  </xsl:if>
</xsl:template>

<xsl:template name="copy-anchor">
  <xsl:call-template name="check-anchor"/>
  <xsl:choose>
    <xsl:when test="@anchor and @anchor!=''">
      <xsl:attribute name="id"><xsl:value-of select="@anchor"/></xsl:attribute>
    </xsl:when>
    <xsl:when test="self::section">
      <xsl:variable name="slug">
        <xsl:call-template name="sluggy-anchor"/>
      </xsl:variable>
      <xsl:if test="$slug!=''">
        <xsl:attribute name="id"><xsl:value-of select="$slug"/></xsl:attribute>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:template>

<xsl:template name="rfclist-for-dcmeta">
  <xsl:param name="list" />
  <xsl:choose>
    <xsl:when test="contains($list,',')">
      <xsl:variable name="rfcNo" select="substring-before($list,',')" />
      <meta name="dct.replaces" content="urn:ietf:rfc:{$rfcNo}" />
      <xsl:call-template name="rfclist-for-dcmeta">
        <xsl:with-param name="list" select="normalize-space(substring-after($list,','))" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="rfcNo" select="$list" />
      <meta name="dct.replaces" content="urn:ietf:rfc:{$rfcNo}" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-paragraph-number">
  <!-- no paragraph numbers in certain containers -->
  <xsl:if test="not(ancestor::ul) and not(ancestor::dl) and not(ancestor::ol)">
  
    <xsl:choose>
      <xsl:when test="parent::blockquote or parent::x:blockquote">
        <!-- boilerplate -->
        <xsl:for-each select="parent::blockquote|parent::x:blockquote"><xsl:call-template name="get-paragraph-number" />.</xsl:for-each>
        <xsl:number count="t|x:blockquote|blockquote|x:note|aside|ul|dl|ol"/>
      </xsl:when>
  
      <xsl:when test="parent::aside or parent::x:note">
        <!-- boilerplate -->
        <xsl:for-each select="parent::aside|parent::x:note"><xsl:call-template name="get-paragraph-number" />.</xsl:for-each>
        <xsl:number count="t|x:blockquote|blockquote|x:note|aside|ul|dl|ol"/>
      </xsl:when>

      <xsl:when test="ancestor::section">
        <!-- get section number of ancestor section element, then add t number -->
        <xsl:for-each select="ancestor::section[1]"><xsl:call-template name="get-section-number" />.p.</xsl:for-each>
        <xsl:variable name="b"><xsl:number count="t|x:blockquote|blockquote|x:note|aside|ul|dl|ol"/></xsl:variable>
        <xsl:choose>
          <xsl:when test="parent::section and ../@removeInRFC='true' and ../t[1]!=$section-removeInRFC">
            <xsl:value-of select="1 + $b"/>
          </xsl:when>
          <xsl:otherwise><xsl:value-of select="$b"/></xsl:otherwise>
        </xsl:choose>
      </xsl:when>
  
      <xsl:when test="ancestor::note">
        <!-- or get section number of ancestor note element, then add t number -->
        <xsl:for-each select="ancestor::note[1]"><xsl:call-template name="get-section-number" />.p.</xsl:for-each>
        <xsl:variable name="b"><xsl:number count="t|x:blockquote|blockquote|x:note|aside|ul|dl|ol"/></xsl:variable>
        <xsl:choose>
          <xsl:when test="parent::note and ../@removeInRFC='true' and ../t[1]!=$note-removeInRFC">
            <xsl:value-of select="1 + $b"/>
          </xsl:when>
          <xsl:otherwise><xsl:value-of select="$b"/></xsl:otherwise>
        </xsl:choose>
      </xsl:when>
  
      <!-- abstract -->
      <xsl:when test="ancestor::abstract">
        <xsl:text>p.</xsl:text>
        <xsl:number count="t|x:blockquote|blockquote|x:note|aside|ul|dl|ol"/>
      </xsl:when>
  
      <xsl:otherwise/>
    </xsl:choose>  
  </xsl:if>
</xsl:template>

<xsl:template name="editingMark">
  <xsl:if test="$xml2rfc-editing='yes' and ancestor::rfc">
    <sup class="editingmark"><span><xsl:number level="any" count="postamble|preamble|t"/></span>&#0160;</sup>
  </xsl:if>
</xsl:template>

<!-- internal ref support -->
<xsl:key name="anchor-item-alias" match="//*[@anchor and (x:anchor-alias/@value or ed:replace/ed:ins/x:anchor-alias)]" use="x:anchor-alias/@value | ed:replace/ed:ins/x:anchor-alias/@value"/>

<xsl:template match="x:ref">
  <xsl:variable name="val" select="normalize-space(.)"/>
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      <xsl:variable name="t">
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          <xsl:with-param name="ref" select="$nodes[1]"/>
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      <a href="{$t}" class="smpl">
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      <xsl:value-of select="."/>
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</xsl:template>

<!-- Nothing to do here -->
<xsl:template match="x:anchor-alias" />

<!-- Quotes -->
<xsl:template match="x:q">
  <q>
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    <xsl:apply-templates/>
  </q>
</xsl:template>

<!-- Notes -->
<xsl:template match="x:note|aside">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
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  <div>
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    <aside>
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<xsl:template match="x:bcp14|bcp14">
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      <em class="bcp14"><xsl:value-of select="."/></em>
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      <em class="bcp14"><xsl:value-of select="."/></em>
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      <em class="bcp14"><xsl:value-of select="."/></em>
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      <em class="bcp14"><xsl:value-of select="."/></em>
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      <xsl:value-of select="."/>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unknown BCP14 keyword: ',.)"/>
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</xsl:template>

<xsl:template match="x:blockquote|blockquote">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
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  <div>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:call-template name="editingMark" />
    <xsl:if test="string-length($p) &gt; 0 and not(ancestor::ed:del) and not(ancestor::ed:ins)">
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    <blockquote>
      <xsl:call-template name="copy-anchor"/>
      <xsl:copy-of select="@cite"/>
      <xsl:choose>
        <xsl:when test="t|ul|ol|dl|artwork|figure|sourcecode">
          <xsl:apply-templates/>
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          <p>
            <xsl:apply-templates/>
          </p>
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      <xsl:if test="@quotedFrom">
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          <xsl:text>&#8212; </xsl:text>
          <xsl:choose>
            <xsl:when test="@cite"><a href="{@cite}"><xsl:value-of select="@quotedFrom"/></a></xsl:when>
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  </div>
</xsl:template>

<!-- Definitions -->
<xsl:template match="x:dfn">
  <dfn>
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    <xsl:apply-templates/>
  </dfn>
</xsl:template>

<!-- headings -->
<xsl:template match="x:h">
  <b>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </b>
</xsl:template>

<!-- superscripts -->
<xsl:template match="x:sup|sup">
  <sup>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </sup>
</xsl:template>

<!-- subscripts -->
<xsl:template match="sub">
  <sub>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </sub>
</xsl:template>

<!-- bold -->
<xsl:template match="x:highlight">
  <b>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </b>
</xsl:template>

<!-- measuring lengths -->
<xsl:template match="x:length-of">
  <xsl:variable name="target" select="//*[@anchor=current()/@target]"/>
  <xsl:if test="count($target)!=1">
    <xsl:call-template name="error">
      <xsl:with-param name="msg" select="concat('@target ',@target,' defined ',count($target),' times.')"/>
    </xsl:call-template>
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  <xsl:variable name="content">
    <xsl:apply-templates select="$target"/>
  </xsl:variable>
  <xsl:variable name="lineends" select="string-length($content) - string-length(translate($content,'&#10;',''))"/>
  <xsl:variable name="indents">
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      <xsl:when test="@indented">
        <xsl:value-of select="number(@indented) * $lineends"/>
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      <xsl:otherwise>0</xsl:otherwise>
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  <xsl:value-of select="string-length($content) + $lineends - $indents"/>
</xsl:template>

<!-- Almost Nop -->
<xsl:template match="x:span">
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      <code class="{$prettyprint-class}">
        <xsl:call-template name="copy-anchor"/>
        <xsl:apply-templates/>
      </code>
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      <span>
        <xsl:call-template name="copy-anchor"/>
        <xsl:apply-templates/>
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</xsl:template>

<xsl:template match="x:parse-xml">
  <xsl:apply-templates/>

  <xsl:if test="function-available('exslt:node-set')">
    <xsl:variable name="cleaned">
      <xsl:apply-templates mode="cleanup-edits"/>
    </xsl:variable>
    <xsl:if test="$xml2rfc-ext-trace-parse-xml='yes'">
      <xsl:call-template name="trace">
        <xsl:with-param name="msg" select="concat('Parsing XML: ', $cleaned)"/>
      </xsl:call-template>
    </xsl:if>
    <xsl:choose>
      <xsl:when test="function-available('myns:parseXml')" use-when="function-available('myns:parseXml')">
        <xsl:if test="myns:parseXml(concat($cleaned,''))!=''">
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="concat('Parse error in XML: ', myns:parseXml(concat($cleaned,'')))"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:when>
      <xsl:when test="function-available('saxon:parse')" use-when="function-available('saxon:parse')">
        <xsl:variable name="parsed" select="saxon:parse(concat($cleaned,''))"/>
        <xsl:if test="$parsed='foo'">
          <xsl:comment>should not get here</xsl:comment>
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      </xsl:when>
      <xsl:when test="false()"></xsl:when>
      <xsl:otherwise></xsl:otherwise>
    </xsl:choose>
  </xsl:if>
</xsl:template>

<!-- inlined RDF support -->
<xsl:template match="rdf:Description">
  <!-- ignore -->
</xsl:template>

<!-- cleanup for ins/del -->

<xsl:template match="comment()|@*" mode="cleanup-edits"><xsl:copy/></xsl:template>

<xsl:template match="text()" mode="cleanup-edits"><xsl:copy/></xsl:template>

<xsl:template match="/" mode="cleanup-edits">
  <xsl:copy><xsl:apply-templates select="node()" mode="cleanup-edits" /></xsl:copy>
</xsl:template>

<xsl:template match="ed:del" mode="cleanup-edits"/>

<xsl:template match="ed:replace" mode="cleanup-edits">
  <xsl:apply-templates mode="cleanup-edits"/>
</xsl:template>

<xsl:template match="ed:ins" mode="cleanup-edits">
  <xsl:apply-templates mode="cleanup-edits"/>
</xsl:template>


<!-- ABNF support -->
<xsl:template name="to-abnf-char-sequence">
  <xsl:param name="chars"/>

  <xsl:variable name="asciistring">&#160; !"#$%&amp;'()*+,-./<xsl:value-of select="$digits"/>:;&lt;=>?@<xsl:value-of select="$ucase"/>[\]^_`<xsl:value-of select="$lcase"/>{|}~&#127;</xsl:variable> 
  <xsl:variable name="hex">0123456789ABCDEF</xsl:variable>
  
  <xsl:variable name="c" select="substring($chars,1,1)"/>
  <xsl:variable name="r" select="substring($chars,2)"/>
  <xsl:variable name="pos" select="string-length(substring-before($asciistring,$c))"/>
  
  <xsl:choose>
    <xsl:when test="$pos >= 1">
      <xsl:variable name="ascii" select="$pos + 31"/>
      <xsl:variable name="h" select="floor($ascii div 16)"/>
      <xsl:variable name="l" select="floor($ascii mod 16)"/>
      <xsl:value-of select="concat(substring($hex,1 + $h,1),substring($hex,1 + $l,1))"/>
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    <xsl:otherwise>
      <xsl:text>??</xsl:text>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('unexpected character in ABNF char sequence: ',substring($chars,1,1))" />
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

  <xsl:if test="$r!=''">
    <xsl:text>.</xsl:text>
    <xsl:call-template name="to-abnf-char-sequence">
      <xsl:with-param name="chars" select="$r"/>
    </xsl:call-template>
  </xsl:if>

</xsl:template>

<xsl:template match="x:abnf-char-sequence">
  <xsl:choose>
    <xsl:when test="substring(.,1,1) != '&quot;' or substring(.,string-length(.),1) != '&quot;'">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'contents of x:abnf-char-sequence needs to be quoted.'" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>%x</xsl:text>
      <xsl:call-template name="to-abnf-char-sequence">
        <xsl:with-param name="chars" select="substring(.,2,string-length(.)-2)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- box drawing -->

<!-- nop for alignment -->
<xsl:template match="x:x"/>

<!-- box (top) -->
<xsl:template match="x:bt">
  <xsl:text>&#x250c;</xsl:text>
  <xsl:value-of select="translate(substring(.,2,string-length(.)-2),'-','&#x2500;')"/>
  <xsl:text>&#x2510;</xsl:text>
</xsl:template>

<!-- box (center) -->
<xsl:template match="x:bc">
  <xsl:variable name="first" select="substring(.,1)"/>
  <xsl:variable name="content" select="substring(.,2,string-length(.)-2)"/>
  <xsl:variable name="is-delimiter" select="translate($content,'-','')=''"/>

  <xsl:choose>
    <xsl:when test="$is-delimiter">
      <xsl:text>&#x251c;</xsl:text>
      <xsl:value-of select="translate($content,'-','&#x2500;')"/>
      <xsl:text>&#x2524;</xsl:text>
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    <xsl:when test="*">
      <xsl:for-each select="node()">
        <xsl:choose>
          <xsl:when test="position()=1">
            <xsl:text>&#x2502;</xsl:text>
            <xsl:value-of select="substring(.,2)"/>
          </xsl:when>
          <xsl:when test="position()=last()">
            <xsl:value-of select="substring(.,1,string-length(.)-1)"/>
            <xsl:text>&#x2502;</xsl:text>
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          <xsl:otherwise>
            <xsl:apply-templates select="."/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:for-each>
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    <xsl:otherwise>
      <xsl:text>&#x2502;</xsl:text>
      <xsl:value-of select="$content"/>
      <xsl:text>&#x2502;</xsl:text>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<!-- box (bottom) -->
<xsl:template match="x:bb">
  <xsl:text>&#x2514;</xsl:text>
  <xsl:value-of select="translate(substring(.,2,string-length(.)-2),'-','&#x2500;')"/>
  <xsl:text>&#x2518;</xsl:text>
</xsl:template>

<!-- author handling extensions -->
<xsl:template match="x:include-author">
  <xsl:for-each select="/*/front/author[@anchor=current()/@target]">
    <xsl:apply-templates select="."/>
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</xsl:template>

<!-- boilerplate -->
<xsl:template match="boilerplate">
  <xsl:apply-templates/>
</xsl:template>

<!-- experimental annotation support -->

<xsl:template match="ed:issueref">
  <xsl:choose>
    <xsl:when test=".=//ed:issue/@name">
      <a href="#{$anchor-pref}issue.{.}">
        <xsl:apply-templates/>
      </a>
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    <xsl:when test="@href">
      <a href="{@href}" id="{$anchor-pref}issue.{.}">
        <xsl:apply-templates/>
      </a>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">Dangling ed:issueref: <xsl:value-of select="."/></xsl:with-param>
      </xsl:call-template>
      <xsl:apply-templates/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="ed:issue">
  <xsl:variable name="class">
    <xsl:choose>
      <xsl:when test="@status='closed'">closedissue</xsl:when>
      <xsl:otherwise>openissue</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <table class="{$class}">
    <tr>
      <td colspan="3">
        <a id="{$anchor-pref}issue.{@name}">
          <xsl:choose>
            <xsl:when test="@status='closed'">
              <xsl:attribute name="class">closed-issue</xsl:attribute>
            </xsl:when>
            <xsl:when test="@status='editor'">
              <xsl:attribute name="class">editor-issue</xsl:attribute>
            </xsl:when>
            <xsl:otherwise>
              <xsl:attribute name="class">open-issue</xsl:attribute>
            </xsl:otherwise>
          </xsl:choose>
          <xsl:text>&#160;I&#160;</xsl:text>
        </a>
        <xsl:text>&#160;</xsl:text>
        <xsl:choose>
          <xsl:when test="@href">
            <em><a href="{@href}"><xsl:value-of select="@name" /></a></em>
          </xsl:when>
          <xsl:when test="@alternate-href">
            <em>[<a href="{@alternate-href}">alternate link</a>]</em>
          </xsl:when>
          <xsl:otherwise>
            <em><xsl:value-of select="@name" /></em>
          </xsl:otherwise>
        </xsl:choose>
        &#0160;
        (type: <xsl:value-of select="@type"/>, status: <xsl:value-of select="@status"/>)
      </td>
    </tr>

    <xsl:apply-templates select="ed:item"/>
    <xsl:apply-templates select="ed:resolution"/>

    <xsl:variable name="changes" select="//*[@ed:resolves=current()/@name or ed:resolves=current()/@name]" />
    <xsl:if test="$changes">
      <tr>
        <td class="top" colspan="3">
          Associated changes in this document:
          <xsl:variable name="issue" select="@name"/>
          <xsl:for-each select="$changes">
            <a href="#{$anchor-pref}change.{$issue}.{position()}">
              <xsl:variable name="label">
                <xsl:call-template name="get-section-number"/>
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              <xsl:choose>
                <xsl:when test="$label!=''"><xsl:value-of select="$label"/></xsl:when>
                <xsl:otherwise>&lt;<xsl:value-of select="concat('#',$anchor-pref,'change.',$issue,'.',position())"/>&gt;</xsl:otherwise>
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            </a>
            <xsl:if test="position()!=last()">, </xsl:if>
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          <xsl:text>.</xsl:text>
        </td>
      </tr>
    </xsl:if>
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</xsl:template>

<xsl:template match="ed:item">
  <tr>
    <td class="top">
      <xsl:if test="@entered-by">
        <a href="mailto:{@entered-by}?subject={/rfc/@docName},%20{../@name}">
          <i><xsl:value-of select="@entered-by"/></i>
        </a>
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    </td>
    <td class="topnowrap">
      <xsl:value-of select="@date"/>
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    <td class="top">
      <xsl:apply-templates select="node()" mode="issuehtml"/>
    </td>
  </tr>
</xsl:template>

<xsl:template match="ed:resolution">
  <tr>
    <td class="top">
      <xsl:if test="@entered-by">
        <a href="mailto:{@entered-by}?subject={/rfc/@docName},%20{../@name}"><i><xsl:value-of select="@entered-by"/></i></a>
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    </td>
    <td class="topnowrap">
      <xsl:value-of select="@datetime"/>
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    <td class="top">
      <em>Resolution:</em>
      <xsl:apply-templates select="node()" mode="issuehtml"/>
    </td>
  </tr>
</xsl:template>

<xsl:template match="ed:annotation">
  <em>
    <xsl:apply-templates/>
  </em>
</xsl:template>

<!-- special templates for handling XHTML in issues -->
<xsl:template match="text()" mode="issuehtml">
  <xsl:value-of select="."/>
</xsl:template>

<xsl:template match="*|@*" mode="issuehtml">
  <xsl:message terminate="yes">Unexpected node in issue HTML: <xsl:value-of select="name(.)"/></xsl:message>
</xsl:template>

<xsl:template match="xhtml:a|xhtml:b|xhtml:br|xhtml:cite|xhtml:del|xhtml:em|xhtml:i|xhtml:ins|xhtml:q|xhtml:pre|xhtml:tt" mode="issuehtml">
  <xsl:element name="{local-name()}">
    <xsl:apply-templates select="@*|node()" mode="issuehtml"/>
  </xsl:element>
</xsl:template>

<xsl:template match="xhtml:p" mode="issuehtml">
  <xsl:apply-templates select="node()" mode="issuehtml"/>
  <br class="p"/>
</xsl:template>

<xsl:template match="xhtml:a/@href|xhtml:q/@cite" mode="issuehtml">
  <xsl:attribute name="{local-name(.)}">
    <xsl:value-of select="."/>
  </xsl:attribute>
</xsl:template>

<xsl:template match="ed:issueref" mode="issuehtml">
  <xsl:apply-templates select="."/>
</xsl:template>

<xsl:template match="ed:eref" mode="issuehtml">
  <xsl:text>&lt;</xsl:text>
  <a href="{.}"><xsl:value-of select="."/></a>
  <xsl:text>&gt;</xsl:text>
</xsl:template>

<xsl:template name="insertIssuesList">

  <h2 id="{$anchor-pref}issues-list" ><a href="#{$anchor-pref}issues-list">Issues list</a></h2>
  <table>
    <thead>
      <tr>
        <th>Id</th>
        <th>Type</th>
        <th>Status</th>
        <th>Date</th>
        <th>Raised By</th>
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    </thead>
    <tbody>
      <xsl:for-each select="//ed:issue">
        <xsl:sort select="@status" />
        <xsl:sort select="@name" />
        <tr>
          <td><a href="#{$anchor-pref}issue.{@name}"><xsl:value-of select="@name" /></a></td>
          <td><xsl:value-of select="@type" /></td>
          <td><xsl:value-of select="@status" /></td>
          <td><xsl:value-of select="ed:item[1]/@date" /></td>
          <td><a href="mailto:{ed:item[1]/@entered-by}?subject={/rfc/@docName},%20{@name}"><xsl:value-of select="ed:item[1]/@entered-by" /></a></td>
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</xsl:template>

<xsl:template name="insert-diagnostics">

  <!-- check anchor names -->

  <xsl:variable name="badAnchors" select="//*[starts-with(@anchor,$anchor-pref)]" />
  <xsl:if test="$badAnchors">
    <xsl:variable name="text">
      <xsl:text>The following anchor names may collide with internally generated anchors because of their prefix "</xsl:text>
      <xsl:value-of select="$anchor-pref" />
      <xsl:text>": </xsl:text>
      <xsl:for-each select="$badAnchors">
        <xsl:value-of select="@anchor"/>
        <xsl:call-template name="lineno"/>
        <xsl:if test="position()!=last()">, </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:call-template name="warning">
      <xsl:with-param name="msg"><xsl:value-of select="normalize-space($text)"/></xsl:with-param>
      <xsl:with-param name="lineno" select="false()"/>
    </xsl:call-template>
  </xsl:if>

  <xsl:variable name="badV3Anchors" select="//*[substring(@anchor,2,1)='-' and translate(substring(@anchor,1,1),$lcase,'')='']" />
  <xsl:if test="$badV3Anchors">
    <xsl:variable name="text">
      <xsl:text>The following anchor names may collide with internally generated anchors in XML2RFCV3 mode because: </xsl:text>
      <xsl:for-each select="$badV3Anchors">
        <xsl:value-of select="@anchor"/>
        <xsl:call-template name="lineno"/>
        <xsl:if test="position()!=last()">, </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:call-template name="warning">
      <xsl:with-param name="msg"><xsl:value-of select="normalize-space($text)"/></xsl:with-param>
      <xsl:with-param name="lineno" select="false()"/>
    </xsl:call-template>
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  <!-- check ABNF syntax references -->
  <xsl:if test="//artwork[@type='abnf2616' or @type='abnf7230']">
    <xsl:if test="not(//reference//seriesInfo[@name='RFC' and (@value='2068' or @value='2616' or @value='7230')]) and not(//reference//seriesInfo[@name='Internet-Draft' and (starts-with(@value, 'draft-ietf-httpbis-p1-messaging-'))])">
      <!-- check for draft-ietf-httpbis-p1-messaging- is for backwards compat -->
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">document uses HTTP-style ABNF syntax, but doesn't reference RFC 2068, RFC 2616, or RFC 7230.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
  <xsl:if test="//artwork[@type='abnf']">
    <xsl:if test="not(//reference//seriesInfo[@name='RFC' and (@value='2234' or @value='4234' or @value='5234')])">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">document uses ABNF syntax, but doesn't reference RFC 2234, 4234 or 5234.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>

  <!-- check IDs -->
  <xsl:variable name="badTargets" select="//xref[not(@target=//@anchor) and not(@target=exslt:node-set($includeDirectives)//@anchor) and not(ancestor::ed:del)]" />
  <xsl:if test="$badTargets">
    <xsl:variable name="text">
      <xsl:text>The following target names do not exist: </xsl:text>
      <xsl:for-each select="$badTargets">
        <xsl:value-of select="@target"/>
        <xsl:if test="not(@target)">(@target attribute missing)</xsl:if>
        <xsl:call-template name="lineno"/>
        <xsl:if test="position()!=last()">
          <xsl:text>, </xsl:text>
        </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:call-template name="warning">
      <xsl:with-param name="msg"><xsl:value-of select="$text"/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>


</xsl:template>

<!-- special change mark support, not supported by RFC2629 yet -->

<xsl:template match="@ed:*" />

<xsl:template match="ed:del">
  <xsl:call-template name="insert-issue-pointer"/>
  <del>
    <xsl:copy-of select="@*[namespace-uri()='']"/>
    <xsl:if test="not(@title) and ancestor-or-self::*[@ed:entered-by] and @datetime">
      <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
    </xsl:if>
    <xsl:apply-templates />
  </del>
</xsl:template>

<xsl:template match="ed:ins">
  <xsl:call-template name="insert-issue-pointer"/>
  <ins>
    <xsl:copy-of select="@*[namespace-uri()='']"/>
    <xsl:if test="not(@title) and ancestor-or-self::*[@ed:entered-by] and @datetime">
      <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
    </xsl:if>
    <xsl:apply-templates />
  </ins>
</xsl:template>

<xsl:template name="insert-issue-pointer">
  <xsl:param name="deleted-anchor"/>
  <xsl:variable name="change" select="."/>
  <xsl:for-each select="@ed:resolves|ed:resolves">
    <xsl:variable name="resolves" select="."/>
    <!-- need the right context node for proper numbering -->
    <xsl:variable name="count"><xsl:for-each select=".."><xsl:number level="any" count="*[@ed:resolves=$resolves or ed:resolves=$resolves]" /></xsl:for-each></xsl:variable>
    <xsl:variable name="total" select="count(//*[@ed:resolves=$resolves or ed:resolves=$resolves])" />
    <xsl:variable name="id">
      <xsl:value-of select="$anchor-pref"/>change.<xsl:value-of select="$resolves"/>.<xsl:value-of select="$count" />
    </xsl:variable>
    <xsl:choose>
      <!-- block level? -->
      <xsl:when test="not(ancestor::t) and not(ancestor::title) and not(ancestor::figure) and not($change/@ed:old-title)">
        <div class="issuepointer {$css-noprint}">
          <xsl:if test="not($deleted-anchor)">
            <xsl:attribute name="id"><xsl:value-of select="$id"/></xsl:attribute>
          </xsl:if>
          <xsl:if test="$count > 1">
            <a class="bg-issue" title="previous change for {$resolves}" href="#{$anchor-pref}change.{$resolves}.{$count - 1}">&#x2191;</a>
          </xsl:if>
          <a class="open-issue" href="#{$anchor-pref}issue.{$resolves}" title="resolves: {$resolves}">
            <xsl:choose>
              <xsl:when test="//ed:issue[@name=$resolves and @status='closed']">
                <xsl:attribute name="class">closed-issue</xsl:attribute>
              </xsl:when>
              <xsl:when test="//ed:issue[@name=$resolves and @status='editor']">
                <xsl:attribute name="class">editor-issue</xsl:attribute>
              </xsl:when>
              <xsl:otherwise>
                <xsl:attribute name="class">open-issue</xsl:attribute>
              </xsl:otherwise>
            </xsl:choose>
            <xsl:text>&#160;I&#160;</xsl:text>
          </a>
          <xsl:if test="$count &lt; $total">
            <a class="bg-issue" title="next change for {$resolves}" href="#{$anchor-pref}change.{$resolves}.{$count + 1}">&#x2193;</a>
          </xsl:if>
          <xsl:text>&#160;</xsl:text>
        </div>
      </xsl:when>
      <xsl:otherwise>
        <xsl:if test="$count > 1">
          <a class="bg-issue" title="previous change for {$resolves}" href="#{$anchor-pref}change.{$resolves}.{$count - 1}">&#x2191;</a>
        </xsl:if>
        <a title="resolves: {$resolves}" href="#{$anchor-pref}issue.{$resolves}">
          <xsl:if test="not($deleted-anchor)">
            <xsl:attribute name="id"><xsl:value-of select="$id"/></xsl:attribute>
          </xsl:if>
          <xsl:choose>
            <xsl:when test="//ed:issue[@name=$resolves and @status='closed']">
              <xsl:attribute name="class">closed-issue <xsl:value-of select="$css-noprint"/></xsl:attribute>
            </xsl:when>
            <xsl:when test="//ed:issue[@name=$resolves and @status='editor']">
              <xsl:attribute name="class">editor-issue <xsl:value-of select="$css-noprint"/></xsl:attribute>
            </xsl:when>
            <xsl:otherwise>
              <xsl:attribute name="class">open-issue <xsl:value-of select="$css-noprint"/></xsl:attribute>
            </xsl:otherwise>
          </xsl:choose>
          <xsl:text>&#160;I&#160;</xsl:text>
        </a>
        <xsl:if test="$count &lt; $total">
          <a class="bg-issue" title="next change for {$resolves}" href="#{$anchor-pref}change.{$resolves}.{$count + 1}">&#x2193;</a>
        </xsl:if>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>

<xsl:template match="ed:replace">
  <!-- we need to special-case things like lists and tables -->
  <xsl:choose>
    <xsl:when test="parent::list">
      <xsl:apply-templates select="ed:del/node()" />
      <xsl:apply-templates select="ed:ins/node()" />
    </xsl:when>
    <xsl:when test="parent::references">
      <xsl:apply-templates select="ed:del/node()" />
      <xsl:apply-templates select="ed:ins/node()" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:if test="@cite">
        <a class="editor-issue" href="{@cite}" target="_blank" title="see {@cite}">
          <xsl:text>&#160;i&#160;</xsl:text>
        </a>
      </xsl:if>
      <xsl:call-template name="insert-issue-pointer"/>
      <xsl:if test="ed:del">
        <del>
          <xsl:copy-of select="@*[namespace-uri()='']"/>
          <xsl:if test="not(@title) and ancestor-or-self::xsl:template[@ed:entered-by] and @datetime">
            <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
          </xsl:if>
          <xsl:apply-templates select="ed:del/node()" />
        </del>
      </xsl:if>
      <xsl:if test="ed:ins">
        <ins>
          <xsl:copy-of select="@*[namespace-uri()='']"/>
          <xsl:if test="not(@title) and ancestor-or-self::*[@ed:entered-by] and @datetime">
            <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
          </xsl:if>
          <xsl:apply-templates select="ed:ins/node()" />
        </ins>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- convenience template for helping Mozilla (pre/ins inheritance problem) -->
<xsl:template name="insertInsDelClass">
  <xsl:if test="ancestor::ed:del">
    <xsl:attribute name="class">del</xsl:attribute>
  </xsl:if>
  <xsl:if test="ancestor::ed:ins">
    <xsl:attribute name="class">ins</xsl:attribute>
  </xsl:if>
</xsl:template>


<xsl:template name="sectionnumberAndEdits">
  <xsl:choose>
    <xsl:when test="ancestor::ed:del">
      <xsl:text>del-</xsl:text>
      <xsl:number count="ed:del//section" level="any"/>
    </xsl:when>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number!=''">
      <xsl:value-of select="@x:fixed-section-number"/>
    </xsl:when>
    <xsl:when test="(@x:fixed-section-number and @x:fixed-section-number='') or @numbered='false'">
      <xsl:text>unnumbered-</xsl:text>
      <xsl:number count="section[@x:fixed-section-number='' or @numbered='false']" level="any"/>
    </xsl:when>
    <xsl:when test="self::section and parent::ed:ins and local-name(../..)='replace'">
      <xsl:for-each select="../.."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:for-each select="..">
        <xsl:if test="parent::ed:replace">
          <xsl:for-each select="..">
            <xsl:if test="parent::section">.</xsl:if>
            <xsl:variable name="cnt" select="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
            <xsl:choose>
              <xsl:when test="ancestor::back and not(ancestor::section)"><xsl:number format="A" value="$cnt"/></xsl:when>
              <xsl:otherwise><xsl:value-of select="$cnt"/></xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
        </xsl:if>
      </xsl:for-each>
    </xsl:when>
    <xsl:when test="self::section[parent::ed:ins]">
      <xsl:for-each select="../.."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:for-each select="..">
        <xsl:if test="parent::section">.</xsl:if><xsl:value-of select="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
      </xsl:for-each>
    </xsl:when>
    <xsl:when test="self::section">
      <xsl:for-each select=".."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:if test="parent::section">.</xsl:if>
      <xsl:choose>
        <xsl:when test="parent::back">
          <xsl:number format="A" value="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
        </xsl:when>
        <xsl:otherwise>
          <xsl:number value="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="self::references">
      <xsl:choose>
        <xsl:when test="count(/*/back/references)+count(/*/back/ed:replace/ed:ins/references)=1"><xsl:call-template name="get-references-section-number"/></xsl:when>
        <xsl:otherwise><xsl:call-template name="get-references-section-number"/>.<xsl:number level="any"/></xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="self::middle or self::back"><!-- done --></xsl:when>
    <xsl:otherwise>
      <!-- go up one level -->
      <xsl:for-each select=".."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- utilities for warnings -->

<xsl:template name="trace">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">TRACE</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
    <xsl:with-param name="lineno" select="$lineno"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="inline-warning">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">WARNING</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="'yes'"/>
    <xsl:with-param name="lineno" select="$lineno"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="warning">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">WARNING</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="'no'"/>
    <xsl:with-param name="lineno" select="$lineno"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="info">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">INFO</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="'no'"/>
    <xsl:with-param name="lineno" select="$lineno"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="error">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">ERROR</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
    <xsl:with-param name="lineno" select="$lineno"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="emit-message">
  <xsl:param name="level"/>
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:param name="lineno" select="true()"/>
  <xsl:variable name="message"><xsl:value-of select="$level"/>: <xsl:value-of select="$msg"/><xsl:if test="$msg2!=''"> - <xsl:value-of select="$msg2"/></xsl:if><xsl:if test="$lineno"><xsl:call-template name="lineno"/></xsl:if></xsl:variable>
  <xsl:choose>
    <xsl:when test="$inline!='no'">
      <xsl:choose>
        <xsl:when test="ancestor::t">
          <span class="{$css-error}"><xsl:value-of select="$message"/></span>
        </xsl:when>
        <xsl:otherwise>
          <div class="{$css-error}"><xsl:value-of select="$message"/></div>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <!-- this fails when the message contains characters not encodable in the output encoding -->
      <!-- <xsl:comment><xsl:value-of select="$message"/></xsl:comment> -->
    </xsl:otherwise>
  </xsl:choose>
  <xsl:message><xsl:value-of select="$message"/></xsl:message>
</xsl:template>

<!-- table formatting -->

<xsl:template match="table">
  <div>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="iref"/>
    <table>
      <xsl:if test="name or @anchor!=''">
        <xsl:variable name="n"><xsl:call-template name="get-table-number"/></xsl:variable>
        <caption>
          <xsl:if test="not(starts-with($n,'u'))">
            <xsl:text>Table </xsl:text>
            <xsl:value-of select="$n"/>
            <xsl:if test="name">: </xsl:if>
          </xsl:if>
          <xsl:if test="name">
            <xsl:apply-templates select="name/node()"/>
          </xsl:if>
        </caption>
      </xsl:if>
      <xsl:apply-templates select="*[not(self::iref)]"/>
    </table>
  </div>
</xsl:template>

<xsl:template match="table/name"/>

<xsl:template match="tbody">
  <tbody>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="*"/>
  </tbody>
</xsl:template>

<xsl:template match="tfoot">
  <tfoot>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="*"/>
  </tfoot>
</xsl:template>

<xsl:template match="thead">
  <thead>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="*"/>
  </thead>
</xsl:template>

<xsl:template match="tr">
  <tr>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="*"/>
  </tr>
</xsl:template>

<xsl:template name="t-alignment">
  <xsl:if test="@align and @align!=''">
    <xsl:attribute name="class">
      <xsl:choose>
        <xsl:when test="@align='left'"><xsl:value-of select="$css-left"/></xsl:when>
        <xsl:when test="@align='right'"><xsl:value-of select="$css-right"/></xsl:when>
        <xsl:when test="@align='center'">center</xsl:when>
        <xsl:otherwise>
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">Unknown align attribute: <xsl:value-of select="@align"/></xsl:with-param>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:attribute>
  </xsl:if>
</xsl:template>

<xsl:template match="td">
  <td>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="t-alignment"/>
    <xsl:copy-of select="@colspan|@rowspan"/>
    <xsl:apply-templates select="node()"/>
  </td>
</xsl:template>

<xsl:template match="th">
  <th>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="t-alignment"/>
    <xsl:copy-of select="@colspan|@rowspan"/>
    <xsl:apply-templates select="node()"/>
  </th>
</xsl:template>

<xsl:template match="td/br|th/br">
  <br/>
</xsl:template>

<xsl:template match="texttable">
  <xsl:call-template name="check-no-text-content"/>

  <xsl:variable name="anch">
    <xsl:call-template name="get-table-anchor"/>
  </xsl:variable>

  <div id="{$anch}" class="{$css-tt}">

    <xsl:if test="@anchor!=''">
      <div id="{@anchor}"/>
    </xsl:if>
    <xsl:apply-templates select="preamble" />

    <xsl:variable name="style">
      <xsl:value-of select="$css-tt"/>
      <xsl:text> </xsl:text>
      <xsl:choose>
        <xsl:when test="@style!=''">
          <xsl:value-of select="@style"/>
        </xsl:when>
        <xsl:otherwise>full</xsl:otherwise>
      </xsl:choose>
      <xsl:choose>
        <xsl:when test="@align='left'"><xsl:text> </xsl:text><xsl:value-of select="$css-tleft"/></xsl:when>
        <xsl:when test="@align='right'"><xsl:text> </xsl:text><xsl:value-of select="$css-tright"/></xsl:when>
        <xsl:when test="@align='center' or not(@align) or @align=''"><xsl:text> </xsl:text><xsl:value-of select="$css-tcenter"/></xsl:when>
        <xsl:otherwise/>
      </xsl:choose>
    </xsl:variable>

    <table class="{$style}">
      <xsl:if test="(@title!='') or (@anchor!='' and not(@suppress-title='true'))">
        <xsl:variable name="n"><xsl:call-template name="get-table-number"/></xsl:variable>
        <caption>
          <xsl:if test="@x:caption-side='top'">
            <xsl:attribute name="class">caption-top</xsl:attribute>
          </xsl:if>
          <xsl:if test="not(starts-with($n,'u'))">
            <xsl:text>Table </xsl:text>
            <xsl:value-of select="$n"/>
            <xsl:if test="@title!=''">: </xsl:if>
          </xsl:if>
          <xsl:if test="@title!=''">
            <xsl:value-of select="@title" />
          </xsl:if>
        </caption>
      </xsl:if>

      <xsl:if test="ttcol!=''">
        <!-- skip header when all column titles are empty -->
        <thead>
          <tr>
            <xsl:apply-templates select="ttcol" />
          </tr>
        </thead>
      </xsl:if>
      <tbody>
        <xsl:variable name="columns" select="count(ttcol)" />
        <xsl:variable name="fields" select="c | ed:replace/ed:ins/c | ed:replace/ed:del/c" />
        <xsl:for-each select="$fields[$columns=1 or (position() mod $columns) = 1]">
          <tr>
            <xsl:for-each select=". | following-sibling::c[position() &lt; $columns]">
              <td>
                <xsl:call-template name="copy-anchor"/>
                <xsl:call-template name="insertInsDelClass"/>
                <xsl:variable name="pos" select="position()" />
                <xsl:variable name="col" select="../ttcol[position() = $pos]" />
                <xsl:choose>
                  <xsl:when test="$col/@align='right' or $col/@align='center'">
                    <xsl:attribute name="class"><xsl:value-of select="$col/@align"/></xsl:attribute>
                  </xsl:when>
                  <xsl:when test="$col/@align='left' or not($col/@align)">
                    <xsl:attribute name="class"><xsl:value-of select="$css-left"/></xsl:attribute>
                  </xsl:when>
                  <xsl:otherwise>
                    <xsl:call-template name="warning">
                      <xsl:with-param name="msg">Unknown align attribute on ttcol: <xsl:value-of select="$col/@align"/></xsl:with-param>
                    </xsl:call-template>
                  </xsl:otherwise>
                </xsl:choose>
                <xsl:apply-templates select="node()" />
              </td>
            </xsl:for-each>
          </tr>
        </xsl:for-each>
      </tbody>
    </table>
    <xsl:apply-templates select="postamble" />
  </div>

</xsl:template>

<xsl:template match="ttcol">
  <th>

    <xsl:choose>
      <xsl:when test="@align='right' or @align='center' or @align='left'">
        <xsl:attribute name="class"><xsl:value-of select="@align"/></xsl:attribute>
      </xsl:when>
      <xsl:when test="not(@align)">
        <!-- that's the default, nothing to do here -->
      </xsl:when>
      <xsl:otherwise>
        <xsl:message>Unknown align attribute on ttcol: <xsl:value-of select="@align"/></xsl:message>
      </xsl:otherwise>
    </xsl:choose>

    <xsl:if test="@width">
      <xsl:attribute name="style">width: <xsl:value-of select="@width" />;</xsl:attribute>
    </xsl:if>

    <xsl:apply-templates />
  </th>
</xsl:template>

<!-- cref support -->

<xsl:template name="get-comment-name">
  <xsl:choose>
    <xsl:when test="@anchor">
      <xsl:value-of select="@anchor"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-pref"/>
      <xsl:text>comment.</xsl:text>
      <xsl:number count="cref[not(@anchor)]" level="any"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="cref">
  <xsl:if test="$xml2rfc-comments!='no'">
    <xsl:variable name="cid">
      <xsl:call-template name="get-comment-name"/>
    </xsl:variable>

    <span class="comment">
      <xsl:choose>
        <xsl:when test="$xml2rfc-inline='yes'">
          <xsl:attribute name="id">
            <xsl:value-of select="$cid"/>
          </xsl:attribute>
          <xsl:text>[</xsl:text>
          <a href="#{$cid}" class="smpl">
            <xsl:value-of select="$cid"/>
          </a>
          <xsl:text>: </xsl:text>
          <xsl:apply-templates select="text()|eref|xref"/>
          <xsl:if test="@source"> --<xsl:value-of select="@source"/></xsl:if>
          <xsl:text>]</xsl:text>
        </xsl:when>
        <xsl:otherwise>
          <xsl:attribute name="title">
            <xsl:if test="@source"><xsl:value-of select="@source"/>: </xsl:if>
            <xsl:variable name="content">
              <xsl:apply-templates select="text()|eref|xref"/>
            </xsl:variable>
            <xsl:value-of select="$content"/>
          </xsl:attribute>
          <xsl:text>[</xsl:text>
          <a href="#{$cid}">
            <xsl:value-of select="$cid"/>
          </a>
          <xsl:text>]</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </span>
  </xsl:if>
</xsl:template>

<xsl:template name="insertComments">

  <xsl:call-template name="insert-conditional-hrule"/>

  <h2>
    <xsl:call-template name="insert-conditional-pagebreak"/>
    <a id="{$anchor-pref}comments" href="#{$anchor-pref}comments">Editorial Comments</a>
  </h2>

  <dl>
    <xsl:for-each select="//cref">
      <xsl:variable name="cid">
        <xsl:choose>
          <xsl:when test="@anchor">
            <xsl:value-of select="@anchor"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="$anchor-pref"/>
            <xsl:text>comment.</xsl:text>
            <xsl:number count="cref[not(@anchor)]" level="any"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <dt id="{$cid}">
        [<xsl:value-of select="$cid"/>]
      </dt>
      <dd>
        <xsl:apply-templates select="node()"/>
        <xsl:if test="@source"> --<xsl:value-of select="@source"/></xsl:if>
      </dd>
    </xsl:for-each>
  </dl>
</xsl:template>


<!-- Chapter Link Generation -->

<xsl:template match="*" mode="links"><xsl:apply-templates mode="links"/></xsl:template>
<xsl:template match="text()" mode="links" />

<xsl:template match="/*/middle//section[not(ancestor::section)]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-section-number" /></xsl:variable>
  <xsl:variable name="title">
    <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
      <xsl:value-of select="$sectionNumber"/>
      <xsl:text> </xsl:text>
    </xsl:if>
    <xsl:choose>
      <xsl:when test="name">
        <xsl:variable name="hold">
          <xsl:apply-templates select="name/node()"/>
        </xsl:variable>
        <xsl:value-of select="normalize-space($hold)"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="@title"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <link rel="Chapter" title="{$title}" href="#{$anchor-pref}section.{$sectionNumber}"/>
  <xsl:apply-templates mode="links" />
</xsl:template>

<xsl:template match="/*/back//section[not(ancestor::section)]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-section-number" /></xsl:variable>
  <xsl:variable name="title">
    <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
      <xsl:value-of select="$sectionNumber"/>
      <xsl:text> </xsl:text>
    </xsl:if>
    <xsl:choose>
      <xsl:when test="name">
        <xsl:variable name="hold">
          <xsl:apply-templates select="name/node()"/>
        </xsl:variable>
        <xsl:value-of select="normalize-space($hold)"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="@title"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <link rel="Appendix" title="{$title}" href="#{$anchor-pref}section.{$sectionNumber}"/>
  <xsl:apply-templates mode="links" />
</xsl:template>

<xsl:template match="/*/back/references[position()=1]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-references-section-number" /></xsl:variable>
  <link rel="Chapter" href="#{$anchor-pref}section.{$sectionNumber}">
    <xsl:choose>
      <xsl:when test="@title and count(/*/back/references)=1">
        <xsl:attribute name="title">
          <xsl:call-template name="get-references-section-number"/>
          <xsl:text> </xsl:text>
          <xsl:value-of select="@title"/>
        </xsl:attribute>
      </xsl:when>
      <xsl:otherwise>
        <xsl:attribute name="title">
          <xsl:call-template name="get-references-section-number"/>
          <xsl:text> </xsl:text>
          <xsl:value-of select="$xml2rfc-refparent"/>
        </xsl:attribute>
      </xsl:otherwise>
    </xsl:choose>
  </link>
</xsl:template>

<!-- convenience templates -->

<xsl:template name="get-author-summary">
  <xsl:choose>
    <xsl:when test="count(/rfc/front/author)=1">
      <xsl:value-of select="/rfc/front/author[1]/@surname" />
    </xsl:when>
    <xsl:when test="count(/rfc/front/author)=2">
      <xsl:value-of select="concat(/rfc/front/author[1]/@surname,' &amp; ',/rfc/front/author[2]/@surname)" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat(/rfc/front/author[1]/@surname,', et al.')" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-bottom-center">
  <xsl:choose>
    <xsl:when test="/rfc/@docName">
      <!-- for IDs, use the expiry date -->
      <xsl:text>Expires </xsl:text><xsl:call-template name="expirydate" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="get-category-long"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-category-long">
  <xsl:choose>
    <xsl:when test="$xml2rfc-footer!=''"><xsl:value-of select="$xml2rfc-footer" /></xsl:when>
    <xsl:when test="$xml2rfc-private!=''"/> <!-- private draft, footer not set -->
    <xsl:when test="/rfc/@category='bcp'">Best Current Practice</xsl:when>
    <xsl:when test="/rfc/@category='historic'">Historic</xsl:when>
    <xsl:when test="/rfc/@category='info' or not(/rfc/@category)">Informational</xsl:when>
    <xsl:when test="/rfc/@category='std'">Standards Track</xsl:when>
    <xsl:when test="/rfc/@category='exp'">Experimental</xsl:when>
    <xsl:otherwise>(category unknown)</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-header-center">
  <xsl:choose>
    <xsl:when test="string-length(/rfc/front/title/@abbrev) &gt; 0">
      <xsl:value-of select="/rfc/front/title/@abbrev" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="/rfc/front/title" mode="get-text-content" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-header-left">
  <xsl:choose>
    <xsl:when test="$xml2rfc-header!=''"><xsl:value-of select="$xml2rfc-header" /></xsl:when>
    <xsl:when test="$xml2rfc-private!=''"/> <!-- private draft, header not set -->
    <xsl:when test="/rfc/@ipr and not(/rfc/@number)">Internet-Draft</xsl:when>
    <xsl:otherwise>RFC <xsl:value-of select="/rfc/@number"/></xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-generator">
  <xsl:variable name="gen">
    <xsl:text>http://greenbytes.de/tech/webdav/rfc2629.xslt, </xsl:text>
    <!-- when RCS keyword substitution in place, add version info -->
    <xsl:if test="contains('$Revision: 1.928 $',':')">
      <xsl:value-of select="concat('Revision ',normalize-space(translate(substring-after('$Revision: 1.928 $', 'Revision: '),'$','')),', ')" />
    </xsl:if>
    <xsl:if test="contains('$Date: 2017/10/01 15:54:03 $',':')">
      <xsl:value-of select="concat(normalize-space(translate(substring-after('$Date: 2017/10/01 15:54:03 $', 'Date: '),'$','')),', ')" />
    </xsl:if>
    <xsl:value-of select="concat('XSLT vendor: ',system-property('xsl:vendor'),' ',system-property('xsl:vendor-url'))" />
  </xsl:variable>
  <xsl:value-of select="$gen" />
</xsl:template>

<xsl:template name="get-header-right">
  <xsl:value-of select="concat($xml2rfc-ext-pub-month, ' ', $xml2rfc-ext-pub-year)" />
</xsl:template>

<xsl:template name="get-keywords">
  <xsl:for-each select="/rfc/front/keyword">
    <xsl:if test="contains(.,',')">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">keyword element appears to contain a comma-separated list, split into multiple elements instead.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
    <xsl:value-of select="normalize-space(.)" />
    <xsl:if test="position()!=last()">, </xsl:if>
  </xsl:for-each>
</xsl:template>

<!-- get language from context node. nearest ancestor or return the default of "en" -->
<xsl:template name="get-lang">
  <xsl:choose>
    <xsl:when test="ancestor-or-self::*[@xml:lang]"><xsl:value-of select="ancestor-or-self::*/@xml:lang" /></xsl:when>
    <xsl:otherwise>en</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-section-number">
  <xsl:variable name="anchor" select="@anchor"/>
  <xsl:choose>
    <xsl:when test="self::note">
      <xsl:number count="note"/>
    </xsl:when>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number!=''">
      <xsl:value-of select="@x:fixed-section-number"/>
    </xsl:when>
    <xsl:when test="(@x:fixed-section-number and @x:fixed-section-number='') or @numbered='false'">
      <xsl:text>unnumbered-</xsl:text>
      <xsl:number count="section[@x:fixed-section-number='' or @numbered='false']" level="any"/>
      <!-- checks -->
      <xsl:if test="@numbered='false'">
        <xsl:if test="ancestor::section or ancestor::section">
          <xsl:call-template name="error">
            <xsl:with-param name="msg">Only top-level sections can be unnumbered</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
        <xsl:if test="following-sibling::section[not(@numbered) or @numbered!='false'] or following-sibling::references">
          <xsl:call-template name="error">
            <xsl:with-param name="msg">Unnumbered section is followed by numbered sections</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
      </xsl:if>
    </xsl:when>
    <xsl:when test="$has-edits or ancestor::*/@x:fixed-section-number">
      <xsl:call-template name="sectionnumberAndEdits" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:choose>
        <xsl:when test="self::references">
          <xsl:choose>
            <xsl:when test="count(/*/back/references)=1">
              <xsl:call-template name="get-references-section-number"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:call-template name="get-references-section-number"/>.<xsl:number count="references"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:when test="self::reference">
          <xsl:for-each select="parent::references">
            <xsl:choose>
              <xsl:when test="count(/*/back/references)=1">
                <xsl:call-template name="get-references-section-number"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:call-template name="get-references-section-number"/>.<xsl:number count="references"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
        </xsl:when>
        <xsl:when test="ancestor::reference">
          <xsl:for-each select="ancestor::reference">
            <xsl:call-template name="get-section-number"/>
          </xsl:for-each>
        </xsl:when>
        <xsl:when test="ancestor::back"><xsl:number count="section|appendix" level="multiple" format="A.1.1.1.1.1.1.1" /></xsl:when>
        <xsl:when test="self::appendix"><xsl:number count="appendix" level="multiple" format="A.1.1.1.1.1.1.1" /></xsl:when>
        <xsl:otherwise><xsl:number count="section" level="multiple"/></xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- get the section number for the references section -->
<xsl:template name="get-references-section-number">
  <xsl:value-of select="count(/rfc/middle/section) + count(/rfc/middle/ed:replace/ed:ins/section) + 1"/>
</xsl:template>

<xsl:template name="emit-section-number">
  <xsl:param name="no"/>
  <xsl:value-of select="$no"/><xsl:if test="not(contains($no,'.')) or $xml2rfc-ext-sec-no-trailing-dots!='no'">.</xsl:if>
</xsl:template>

<xsl:template name="get-section-type">
  <xsl:param name="prec" /> <!-- TODO: check this, it's unused -->
  <xsl:choose>
    <xsl:when test="ancestor::back">Appendix</xsl:when>
    <xsl:otherwise>Section</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-table-number">
  <xsl:choose>
    <xsl:when test="@anchor!=''">
      <xsl:number level="any" count="texttable[@anchor!='']|table[@anchor!='']" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>u.</xsl:text>
      <xsl:number level="any" count="texttable[not(@anchor) or @anchor='']|table[not(@anchor) or @anchor='']" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-table-anchor">
  <xsl:value-of select="$anchor-pref"/>
  <xsl:text>table.</xsl:text>
  <xsl:call-template name="get-table-number"/>
</xsl:template>

<xsl:template name="get-figure-number">
  <xsl:choose>
    <xsl:when test="@anchor!=''">
      <xsl:number level="any" count="figure[@anchor!='']" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>u.</xsl:text>
      <xsl:number level="any" count="figure[not(@anchor) or @anchor='']" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-figure-anchor">
  <xsl:value-of select="$anchor-pref"/>
  <xsl:text>figure.</xsl:text>
  <xsl:call-template name="get-figure-number"/>
</xsl:template>

<!-- reformat contents of author/@initials -->
<xsl:template name="format-initials">
  <xsl:variable name="normalized" select="normalize-space(@initials)"/>

  <xsl:choose>
    <xsl:when test="$normalized=''">
      <!-- nothing to do -->
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="r">
        <xsl:call-template name="t-format-initials">
          <xsl:with-param name="remainder" select="$normalized"/>
        </xsl:call-template>
      </xsl:variable>
    
      <xsl:if test="$r!=@initials">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">@initials '<xsl:value-of select="@initials"/>': did you mean '<xsl:value-of select="$r"/>'?</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
    
      <xsl:value-of select="$r"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="t-format-initials">
  <xsl:param name="have"/>
  <xsl:param name="remainder"/>

  <xsl:variable name="first" select="substring($remainder,1,1)"/>
  <xsl:variable name="prev" select="substring($have,string-length($have))"/>

<!--<xsl:message>
have: <xsl:value-of select="$have"/>
remainder: <xsl:value-of select="$remainder"/>
first: <xsl:value-of select="$first"/>
prev: <xsl:value-of select="$prev"/>
</xsl:message>-->

  <xsl:choose>
    <xsl:when test="$remainder='' and $prev!='.'">
      <xsl:value-of select="concat($have,'.')"/>
    </xsl:when>
    <xsl:when test="$remainder=''">
      <xsl:value-of select="$have"/>
    </xsl:when>
    <xsl:when test="$prev='.' and $first='.'">
      <!-- repeating dots -->
      <xsl:call-template name="t-format-initials">
        <xsl:with-param name="have" select="$have"/>
        <xsl:with-param name="remainder" select="substring($remainder,2)"/>
      </xsl:call-template>
    </xsl:when>
    <!-- missing dot before '-' -->
<!--    <xsl:when test="$prev!='.' and $first='-'">
      <xsl:call-template name="t-format-initials">
        <xsl:with-param name="have" select="concat($have,'.-')"/>
        <xsl:with-param name="remainder" select="substring($remainder,2)"/>
      </xsl:call-template>
    </xsl:when>-->
    <!-- missing space after '.' -->
<!--    <xsl:when test="$prev='.' and $first!=' '">
      <xsl:call-template name="t-format-initials">
        <xsl:with-param name="have" select="concat($have,' ',$first)"/>
        <xsl:with-param name="remainder" select="substring($remainder,2)"/>
      </xsl:call-template>
    </xsl:when>-->
    <xsl:otherwise>
      <xsl:call-template name="t-format-initials">
        <xsl:with-param name="have" select="concat($have,$first)"/>
        <xsl:with-param name="remainder" select="substring($remainder,2)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="truncate-initials">
  <xsl:param name="initials"/>
  <xsl:variable name="local-multiple-initials">
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="../../processing-instruction('rfc')|../processing-instruction('rfc')|./processing-instruction('rfc')"/>
      <xsl:with-param name="attr" select="'multiple-initials'"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:variable name="use-multiple-initials">
    <xsl:choose>
      <xsl:when test="$local-multiple-initials!=''">
        <xsl:value-of select="$local-multiple-initials"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$xml2rfc-multiple-initials"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="normalize-space($initials)=''"/>
    <xsl:when test="$use-multiple-initials='yes'">
      <xsl:value-of select="$initials"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat(substring-before($initials,'.'),'.')"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="extract-normalized">
  <xsl:param name="node" select="."/>
  <xsl:param name="name"/>
  <xsl:param name="ascii" select="false()"/>

  <xsl:variable name="n">
    <xsl:choose>
      <xsl:when test="$ascii and $node/@ascii!=''">
        <xsl:value-of select="$node/@ascii"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$node"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:variable name="text" select="normalize-space($n)"/>
  <xsl:if test="string-length($n) != string-length($text)">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">excessive whitespace in <xsl:value-of select="$name"/>: '<xsl:value-of select="$n"/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  <xsl:if test="$text=''">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">missing text in <xsl:value-of select="$name"/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  <xsl:value-of select="$text"/>
</xsl:template>

<!-- checking for email element -->
<xsl:template name="extract-email">
  <xsl:variable name="email" select="normalize-space(.)"/>
  <xsl:if test="contains($email,' ')">
    <xsl:call-template name="error">
      <xsl:with-param name="msg">whitespace in email address: '<xsl:value-of select="."/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:variable name="email2">
    <xsl:choose>
      <xsl:when test="starts-with($email,'mailto:')">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">email should not include URI scheme: '<xsl:value-of select="."/>'</xsl:with-param>
        </xsl:call-template>
        <xsl:value-of select="substring($email, 1 + string-length('mailto:'))"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$email"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:value-of select="$email2"/>
</xsl:template>

<!-- checking for uri element -->
<xsl:template name="extract-uri">
  <xsl:variable name="uri" select="normalize-space(.)"/>
  <xsl:if test="string-length(.) != string-length($uri) or contains($uri,' ')">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">excessive whitespace in URI: '<xsl:value-of select="."/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  <xsl:if test="$uri=''">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">URI is empty</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:value-of select="$uri"/>
</xsl:template>

<xsl:template name="insert-conditional-pagebreak">
  <xsl:if test="$xml2rfc-compact!='yes'">
    <xsl:attribute name="class">np</xsl:attribute>
  </xsl:if>
</xsl:template>

<xsl:template name="insert-conditional-hrule">
  <xsl:if test="$xml2rfc-compact!='yes'">
    <hr class="{$css-noprint}" />
  </xsl:if>
</xsl:template>

<!-- get text content from marked-up text -->

<xsl:template match="text()" mode="get-text-content">
  <xsl:value-of select="."/>
</xsl:template>

<xsl:template match="*" mode="get-text-content">
  <xsl:apply-templates mode="get-text-content"/>
</xsl:template>

<xsl:template match="ed:del" mode="get-text-content">
</xsl:template>

<!-- parsing of processing instructions -->
<xsl:template name="parse-pis">
  <xsl:param name="nodes"/>
  <xsl:param name="attr"/>
  <xsl:param name="sep"/>
  <xsl:param name="ret"/>
  <xsl:param name="default"/>
  <xsl:param name="duplicate-warning" select="'yes'"/>

  <xsl:choose>
    <xsl:when test="count($nodes)=0">
      <xsl:choose>
        <xsl:when test="$ret!=''">
          <xsl:value-of select="$ret"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="$default"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="ret2">
        <xsl:for-each select="$nodes[1]">
          <xsl:call-template name="parse-one-pi">
            <xsl:with-param name="str" select="."/>
            <xsl:with-param name="attr" select="$attr"/>
            <xsl:with-param name="sep" select="$sep"/>
            <xsl:with-param name="ret" select="$ret"/>
            <xsl:with-param name="duplicate-warning" select="$duplicate-warning"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:variable>

      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$nodes[position()!=1]"/>
        <xsl:with-param name="attr" select="$attr"/>
        <xsl:with-param name="sep" select="$sep"/>
        <xsl:with-param name="ret" select="$ret2"/>
        <xsl:with-param name="default" select="$default"/>
        <xsl:with-param name="duplicate-warning" select="$duplicate-warning"/>
      </xsl:call-template>

    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="parse-one-pi">
  <xsl:param name="str"/>
  <xsl:param name="attr"/>
  <xsl:param name="sep"/>
  <xsl:param name="ret"/>
  <xsl:param name="duplicate-warning"/>

  <xsl:variable name="str2">
    <xsl:call-template name="eat-leading-whitespace">
      <xsl:with-param name="str" select="$str"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="$str2=''">
      <!-- done -->
      <xsl:value-of select="$ret"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="attrname" select="substring-before($str2,'=')"/>

      <xsl:choose>
        <xsl:when test="$attrname=''">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">bad PI syntax: <xsl:value-of select="$str2"/></xsl:with-param>
          </xsl:call-template>
          <xsl:value-of select="$ret"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:variable name="remainder" select="substring($str2,2+string-length($attrname))"/>
          <xsl:choose>
            <xsl:when test="string-length($remainder) &lt; 2">
              <xsl:call-template name="warning">
                <xsl:with-param name="msg">bad PI value syntax: <xsl:value-of select="$remainder"/></xsl:with-param>
              </xsl:call-template>
              <xsl:value-of select="$ret"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:variable name="rem">
                <xsl:call-template name="eat-leading-whitespace">
                  <xsl:with-param name="str" select="$remainder"/>
                </xsl:call-template>
              </xsl:variable>
              <xsl:variable name="qchars">&apos;&quot;</xsl:variable>
              <xsl:variable name="qchar" select="substring($rem,1,1)"/>
              <xsl:variable name="rem2" select="substring($rem,2)"/>
              <xsl:choose>
                <xsl:when test="not(contains($qchars,$qchar))">
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg">pseudo-attribute value needs to be quoted: <xsl:value-of select="$rem"/></xsl:with-param>
                  </xsl:call-template>
                  <xsl:value-of select="$ret"/>
                </xsl:when>
                <xsl:when test="not(contains($rem2,$qchar))">
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg">unmatched quote in: <xsl:value-of select="$rem2"/></xsl:with-param>
                  </xsl:call-template>
                  <xsl:value-of select="$ret"/>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:variable name="value" select="substring-before($rem2,$qchar)"/>

                  <!-- check pseudo-attribute names -->
                  <xsl:if test="name()='rfc-ext' and $attr='SANITYCHECK'">
                    <xsl:choose>
                      <xsl:when test="$attrname='allow-markup-in-artwork'"/>
                      <xsl:when test="$attrname='authors-section'"/>
                      <xsl:when test="$attrname='check-artwork-width'"/>
                      <xsl:when test="$attrname='duplex'"/>
                      <xsl:when test="$attrname='html-pretty-print'"/>
                      <xsl:when test="$attrname='include-index'"/>
                      <xsl:when test="$attrname='include-references-in-index'"/>
                      <xsl:when test="$attrname='justification'"/>
                      <xsl:when test="$attrname='paragraph-links'"/>
                      <xsl:when test="$attrname='parse-xml-in-artwork'"/>
                      <xsl:when test="$attrname='refresh-from'"/>
                      <xsl:when test="$attrname='refresh-interval'"/>
                      <xsl:when test="$attrname='refresh-xslt'"/>
                      <xsl:when test="$attrname='sec-no-trailing-dots'"/>
                      <xsl:when test="$attrname='trace-parse-xml'"/>
                      <xsl:when test="$attrname='vspace-pagebreak'"/>
                      <xsl:when test="$attrname='xml2rfc-backend'"/>
                      <xsl:otherwise>
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">unsupported rfc-ext pseudo-attribute '<xsl:value-of select="$attrname"/>'</xsl:with-param>
                        </xsl:call-template>
                      </xsl:otherwise>
                    </xsl:choose>
                  </xsl:if>

                  <xsl:if test="name()='rfc' and $attr='SANITYCHECK'">
                    <xsl:choose>
                      <xsl:when test="$attrname='authorship'"/>
                      <xsl:when test="$attrname='comments'"/>
                      <xsl:when test="$attrname='compact'"/>
                      <xsl:when test="$attrname='docmapping'">
                        <xsl:if test="$value!='yes'">
                          <xsl:call-template name="warning">
                            <xsl:with-param name="msg">the rfc docmapping pseudo-attribute with values other than 'yes' in not supported by this processor.</xsl:with-param>
                          </xsl:call-template>
                        </xsl:if>
                      </xsl:when>
                      <xsl:when test="$attrname='editing'"/>
                      <xsl:when test="$attrname='footer'"/>
                      <xsl:when test="$attrname='header'"/>
                      <xsl:when test="$attrname='include'">
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">the rfc include pseudo-attribute is only partially supported by this processor, see http://greenbytes.de/tech/webdav/rfc2629xslt/rfc2629xslt.html#examples.internalsubset for alternative syntax.</xsl:with-param>
                        </xsl:call-template>
                      </xsl:when>
                      <xsl:when test="$attrname='inline'"/>
                      <xsl:when test="$attrname='iprnotified'"/>
                      <xsl:when test="$attrname='linefile'"/>
                      <xsl:when test="$attrname='linkmailto'"/>
                      <xsl:when test="$attrname='multiple-initials'"/>
                      <xsl:when test="$attrname='private'"/>
                      <xsl:when test="$attrname='rfcedstyle'"/>
                      <xsl:when test="$attrname='sortrefs'"/>
                      <xsl:when test="$attrname='subcompact'"/>
                      <xsl:when test="$attrname='strict'"/>
                      <xsl:when test="$attrname='symrefs'"/>
                      <xsl:when test="$attrname='toc'"/>
                      <xsl:when test="$attrname='tocdepth'"/>
                      <xsl:when test="$attrname='tocindent'">
                        <xsl:if test="$value!='yes'">
                          <xsl:call-template name="warning">
                            <xsl:with-param name="msg">the rfc tocindent pseudo-attribute with values other than 'yes' in not supported by this processor.</xsl:with-param>
                          </xsl:call-template>
                        </xsl:if>
                      </xsl:when>
                      <xsl:otherwise>
                        <xsl:call-template name="info">
                          <xsl:with-param name="msg">unsupported rfc pseudo-attribute '<xsl:value-of select="$attrname"/>'</xsl:with-param>
                        </xsl:call-template>
                      </xsl:otherwise>
                    </xsl:choose>
                  </xsl:if>

                  <xsl:choose>
                    <xsl:when test="$attrname != $attr">
                      <!-- pseudo-attr does not match, continue -->
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="ret" select="$ret"/>
                        <xsl:with-param name="duplicate-warning" select="$duplicate-warning"/>
                      </xsl:call-template>
                    </xsl:when>
                    <xsl:when test="$sep='' and $ret!=''">
                      <!-- pseudo-attr does match, but we only want one value -->
                      <xsl:if test="$ret != $value and $duplicate-warning='yes'">
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">duplicate pseudo-attribute <xsl:value-of select="$attr"/>, overwriting value <xsl:value-of select="$ret"/></xsl:with-param>
                        </xsl:call-template>
                      </xsl:if>
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="ret" select="$value"/>
                        <xsl:with-param name="duplicate-warning" select="$duplicate-warning"/>
                      </xsl:call-template>
                    </xsl:when>
                    <xsl:otherwise>
                      <!-- pseudo-attr does match -->
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="duplicate-warning" select="$duplicate-warning"/>
                        <xsl:with-param name="ret">
                          <xsl:choose>
                            <xsl:when test="$ret!=''">
                              <xsl:value-of select="concat($ret,$sep,$value)"/>
                            </xsl:when>
                            <xsl:otherwise>
                              <xsl:value-of select="$value"/>
                            </xsl:otherwise>
                          </xsl:choose>
                        </xsl:with-param>
                      </xsl:call-template>
                    </xsl:otherwise>

                  </xsl:choose>

                </xsl:otherwise>
              </xsl:choose>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="eat-leading-whitespace">
  <xsl:param name="str"/>

  <xsl:choose>
    <xsl:when test="$str=''">
    </xsl:when>
    <xsl:when test="translate(substring($str,1,1),' &#10;&#13;&#9;',' ')=' '">
      <xsl:call-template name="eat-leading-whitespace">
        <xsl:with-param name="str" select="substring($str,2)"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$str"/>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<!-- diag support -->
<xsl:template name="lineno">
  <xsl:if test="function-available('saxon-old:line-number')" use-when="function-available('saxon-old:line-number')">
    <xsl:if test="saxon-old:line-number() > 0">
      <xsl:text> (at line </xsl:text>
      <xsl:value-of select="saxon-old:line-number()"/>
      <xsl:if test="function-available('saxon-old:systemId')">
        <xsl:variable name="rootsys">
          <xsl:for-each select="/*">
            <xsl:value-of select="saxon-old:systemId()"/>
          </xsl:for-each>
        </xsl:variable>
        <xsl:if test="$rootsys != saxon-old:systemId()">
          <xsl:text> of </xsl:text>
          <xsl:value-of select="saxon-old:systemId()"/>
        </xsl:if>
      </xsl:if>
      <xsl:text>)</xsl:text>
    </xsl:if>
  </xsl:if>
  <xsl:if test="function-available('saxon:line-number')" use-when="function-available('saxon:line-number')">
    <xsl:if test="saxon:line-number() > 0">
      <xsl:text> (at line </xsl:text>
      <xsl:value-of select="saxon:line-number()"/>
      <xsl:if test="function-available('saxon:systemId')">
        <xsl:variable name="rootsys">
          <xsl:for-each select="/*">
            <xsl:value-of select="saxon:systemId()"/>
          </xsl:for-each>
        </xsl:variable>
        <xsl:if test="$rootsys != saxon:systemId()">
          <xsl:text> of </xsl:text>
          <xsl:value-of select="saxon:systemId()"/>
        </xsl:if>
      </xsl:if>
      <xsl:text>)</xsl:text>
    </xsl:if>
  </xsl:if>
</xsl:template>

<!-- define exslt:node-set for msxml -->
<msxsl:script language="JScript" implements-prefix="exslt">
  this['node-set'] = function (x) {
    return x;
  }
</msxsl:script>

<!-- date handling -->

<msxsl:script language="JScript" implements-prefix="date">
  function twodigits(s) {
    return s &lt; 10 ? "0" + s : s;
  }

  this['date-time'] = function (x) {
    var now = new Date();
    var offs = now.getTimezoneOffset();
    return now.getFullYear() + "-"
      + twodigits(1 + now.getMonth()) + "-"
      + twodigits(now.getDate()) + "T"
      + twodigits(now.getHours()) + ":"
      + twodigits(now.getMinutes()) + ":"
      + twodigits(now.getSeconds())
      + (offs >= 0 ? "-" : "+")
      + twodigits(Math.abs(offs) / 60) + ":"
      + twodigits(Math.abs(offs) % 60);
  }
</msxsl:script>

<xsl:variable name="current-year">
  <xsl:choose>
    <xsl:when test="function-available('date:date-time')" use-when="function-available('date:date-time')">
      <xsl:value-of select="substring-before(date:date-time(),'-')"/>
    </xsl:when>
    <xsl:when test="function-available('current-date')">
      <xsl:value-of select="substring-before(string(current-date()),'-')"/>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="current-month">
  <xsl:choose>
    <xsl:when test="function-available('date:date-time')" use-when="function-available('date:date-time')">
      <xsl:value-of select="substring-before(substring-after(date:date-time(),'-'),'-')"/>
    </xsl:when>
    <xsl:when test="function-available('current-date')">
      <xsl:value-of select="substring-before(substring-after(string(current-date()),'-'),'-')"/>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="current-day">
  <xsl:choose>
    <xsl:when test="function-available('date:date-time')" use-when="function-available('date:date-time')">
      <xsl:value-of select="substring-after(substring-after(substring-before(date:date-time(),'T'),'-'),'-')"/>
    </xsl:when>
    <xsl:when test="function-available('current-dateTime')">
      <xsl:value-of select="substring-after(substring-after(substring-before(string(current-dateTime()),'T'),'-'),'-')"/>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:variable>

<xsl:variable name="may-default-dates">
  <xsl:choose>
    <xsl:when test="$current-year!='' and $current-month!='' and $current-day!=''">
      <xsl:variable name="year-specified" select="/rfc/front/date/@year and /rfc/front/date/@year!=''"/>
      <xsl:variable name="month-specified" select="/rfc/front/date/@month and /rfc/front/date/@month!=''"/>
      <xsl:variable name="day-specified" select="/rfc/front/date/@day and /rfc/front/date/@day!=''"/>
      <xsl:variable name="system-month">
        <xsl:call-template name="get-month-as-name">
          <xsl:with-param name="month" select="$current-month"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:choose>
        <xsl:when test="$year-specified and /rfc/front/date/@year!=$current-year">Specified year <xsl:value-of select="/rfc/front/date/@year"/> does not match system date (<xsl:value-of select="$current-year"/>)</xsl:when>
        <xsl:when test="$month-specified and /rfc/front/date/@month!=$system-month">Specified month <xsl:value-of select="/rfc/front/date/@month"/> does not match system date (<xsl:value-of select="$system-month"/>)</xsl:when>
        <xsl:when test="$day-specified and /rfc/front/date/@day!=$current-day">Specified day does not match system date</xsl:when>
        <xsl:when test="not($year-specified) and ($month-specified or $day-specified)">Can't default year when month or day is specified</xsl:when>
        <xsl:when test="not($month-specified) and $day-specified">Can't default month when day is specified</xsl:when>
        <xsl:otherwise>yes</xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <!-- may, but won't -->
    <xsl:otherwise>yes</xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<xsl:param name="xml2rfc-ext-pub-year">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@year and /rfc/front/date/@year!=''">
      <xsl:value-of select="/rfc/front/date/@year"/>
    </xsl:when>
    <xsl:when test="$current-year!='' and $may-default-dates='yes'">
      <xsl:value-of select="$current-year"/>
    </xsl:when>
    <xsl:when test="$current-year!='' and $may-default-dates!='yes'">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="$may-default-dates"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'/rfc/front/date/@year missing (and XSLT processor cannot compute the system date)'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<xsl:param name="xml2rfc-ext-pub-month">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@month and /rfc/front/date/@month!=''">
      <xsl:variable name="m" select="/rfc/front/date/@month"/>
      <xsl:choose>
        <xsl:when test="string(number($m))!='NaN' and number($m) &gt; 0 and number($m) &lt; 13">
          <xsl:call-template name="get-month-as-name">
            <xsl:with-param name="month" select="$m"/>
          </xsl:call-template>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="$m"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="$current-month!='' and $may-default-dates='yes'">
      <xsl:call-template name="get-month-as-name">
        <xsl:with-param name="month" select="$current-month"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="$current-month!='' and $may-default-dates!='yes'">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="$may-default-dates"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'/rfc/front/date/@month missing (and XSLT processor cannot compute the system date)'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<xsl:param name="pub-month-numeric">
  <xsl:call-template name="get-month-as-num">
    <xsl:with-param name="month" select="$xml2rfc-ext-pub-month" />
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-pub-day">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@day and /rfc/front/date/@day!=''">
      <xsl:value-of select="/rfc/front/date/@day"/>
    </xsl:when>
    <xsl:when test="$current-day!='' and $may-default-dates='yes'">
      <xsl:value-of select="$current-day"/>
    </xsl:when>
    <xsl:otherwise /> <!-- harmless, we just don't have it -->
  </xsl:choose>
</xsl:param>

<xsl:param name="pub-yearmonth">
  <!-- year or 0000 -->
  <xsl:choose>
    <xsl:when test="$xml2rfc-ext-pub-year!=''">
      <xsl:value-of select="format-number($xml2rfc-ext-pub-year,'0000')"/>
    </xsl:when>
    <xsl:otherwise>0000</xsl:otherwise>
  </xsl:choose>
  <!-- month or 00 -->
  <xsl:choose>
    <xsl:when test="number($pub-month-numeric) &gt; 0">
      <xsl:value-of select="format-number($pub-month-numeric,'00')"/>
    </xsl:when>
    <xsl:otherwise>00</xsl:otherwise>
  </xsl:choose>
</xsl:param>

<!-- simple validation support -->

<xsl:template match="*" mode="validate">
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>
<xsl:template match="@*" mode="validate"/>

<xsl:template name="warninvalid">
  <xsl:param name="additionalDiagnostics"/>
  <xsl:variable name="pname">
    <xsl:if test="namespace-uri(..)!=''">
      <xsl:value-of select="concat('{',namespace-uri(..),'}')"/>
    </xsl:if>
    <xsl:value-of select="local-name(..)"/>
  </xsl:variable>
  <xsl:variable name="cname">
    <xsl:if test="namespace-uri(.)!=''">
      <xsl:value-of select="concat('{',namespace-uri(.),'}')"/>
    </xsl:if>
    <xsl:value-of select="local-name(.)"/>
  </xsl:variable>
  <xsl:call-template name="warning">
    <xsl:with-param name="msg" select="concat($cname,' not allowed inside ',$pname,$additionalDiagnostics)"/>
  </xsl:call-template>
</xsl:template>

<!-- figure element -->
<xsl:template match="figure/artwork | figure/ed:replace/ed:*/artwork" mode="validate" priority="9">
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>
<xsl:template match="artwork" mode="validate">
  <xsl:call-template name="warninvalid"/>
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>

<!-- li element -->
<xsl:template match="ol/li | ul/li" mode="validate" priority="9">
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>
<xsl:template match="li" mode="validate">
  <xsl:call-template name="warninvalid"/>
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>

<!-- list element -->
<xsl:template match="t/list | t/ed:replace/ed:*/list" mode="validate" priority="9">
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>
<xsl:template match="list" mode="validate">
  <xsl:call-template name="warninvalid"/>
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>

<!-- t element -->
<xsl:template match="abstract/t | abstract/ed:replace/ed:*/t |
                     list/t | list/ed:replace/ed:*/t |
                     note/t | note/ed:replace/ed:*/t |
                     section/t | section/ed:replace/ed:*/t |
                     blockquote/t |
                     x:blockquote/t | x:blockquote/ed:replace/ed:*/t |
                     x:note/t | x:note/ed:replace/ed:*/t |
                     aside/t |
                     td/t | th/t |
                     x:lt/t | li/t | x:lt/ed:replace/ed:*/t | dd/t" mode="validate" priority="9">
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>
<xsl:template match="t" mode="validate">
  <xsl:call-template name="warninvalid"/>
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>

<!-- xref element -->
<xsl:template match="abstract//xref" mode="validate">
  <xsl:call-template name="warninvalid">
    <xsl:with-param name="additionalDiagnostics"> (inside &lt;abstract>)</xsl:with-param>
  </xsl:call-template>
  <xsl:apply-templates select="@*|*" mode="validate"/>
</xsl:template>

<xsl:template name="check-no-text-content">
  <xsl:for-each select="text()">
    <xsl:if test="normalize-space(.)!=''">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg">No text content allowed inside &lt;<xsl:value-of select="local-name(..)"/>&gt;, but found: <xsl:value-of select="."/></xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:for-each>
</xsl:template>

<xsl:template name="render-name">
  <xsl:param name="n"/>
  <xsl:param name="strip-links" select="true()"/>
  <xsl:variable name="t">
    <xsl:apply-templates select="$n"/>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="not($strip-links)">
      <xsl:copy-of select="exslt:node-set($t)"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="exslt:node-set($t)" mode="strip-links"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="render-name-ref">
  <xsl:param name="n"/>
  <xsl:variable name="t">
    <xsl:call-template name="render-name">
      <xsl:with-param name="n" select="$n"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:apply-templates select="exslt:node-set($t)" mode="strip-ids"/>
</xsl:template>

<!-- clean up links from HTML -->
<xsl:template match="comment()|@*" mode="strip-links"><xsl:copy/></xsl:template>
<xsl:template match="text()" mode="strip-links"><xsl:copy/></xsl:template>
<xsl:template match="*" mode="strip-links">
  <xsl:element name="{local-name()}">
  	<xsl:apply-templates select="@*|node()" mode="strip-links" />
  </xsl:element>
</xsl:template>
<xsl:template match="a|xhtml:a" mode="strip-links" xmlns:xhtml="http://www.w3.org/1999/xhtml">
	<xsl:apply-templates select="node()" mode="strip-links" />
</xsl:template>
<xsl:template match="node()|@*" mode="strip-ids">
  <xsl:copy>
	  <xsl:apply-templates select="node()|@*" mode="strip-ids" />
  </xsl:copy>
</xsl:template>
<xsl:template match="@id" mode="strip-ids"/>


<!-- customization: these templates can be overridden in an XSLT that imports from this one -->
<xsl:template name="add-start-material"/>
<xsl:template name="add-end-material"/>

</xsl:transform>