Add vestibular disorders to docs

Resolves #57

Author: JayPanoz

docs/CSS13-a11y_settings_baseline.md

@@ -66,6 +66,18 @@ Luc Maumet (EDRLab) has conducted an analysis on the features available in dedic
 - Highlight a specific sound in the text
 - Export contents with the customized layout
 
+## Vestibular disorders
+
+There’s an a11y “issue” which is quite unknown, but may impact a lot of people, either temporarily or permanently: vestibular disorders.
+
+To put it simply, some interactions can make the user dizzy, uneasy, and in some cases ruin her/his entire day, because the user feels like they can’t keep balance when walking or even staying up, or feel vertigo. [See this article](https://source.opennews.org/articles/motion-sick/) for further details and illustrations.
+
+**At the very minimum, allow the user to disable animations which may create effects (e.g. page-transition animation).** But everything else will vary from implementation to implementation.
+
+On iOS/Mac, there’s a system setting which has been implemented and [browsers increasingly support the prefers-reduced-motion media query](https://webkit.org/blog/7551/responsive-design-for-motion/) to design accordingly.
+
+There’s little we can do about interactive EPUB contents themselves, but we can at least promote what Mozilla got wonderfully right from the start to authors, i.e. [an overlay asking users to set their preference](http://devtoolschallenger.com).
+
 ## Internationalization
 
 Very little information on a11y is currently available in the [W3C Text Layout and Typography Requirements](https://w3c.github.io/typography/).

docs/ReadiumCSS_docs.epub

@@ -33,7 +33,7 @@
       <li>media overlays and user highlights.</li>
     </ul>
 
-    <p><strong>Note:</strong> Readium CSS stylesheets were not designed and should not be used for fixed-layout EPUB, nor other file formats like FB2, PRC, Mobi, TEI, etc.</p>
+	<p><strong>Note:</strong> Readium CSS stylesheets were not designed and should not be used for fixed-layout EPUB, nor other file formats like FB2, PRC, Mobi, TEI, etc.</p>
 
     <section id="important-info" class="level2">
       <h2 id="sigil_toc_id_163">Important info</h2>

docs/ReadiumCSS_docs/OEBPS/Text/Section-002.xhtml

@@ -119,6 +119,20 @@
       </section>
     </section>
 
+	<section id="vestibular-disorders" class="level2">
+	  <h2 id="sigil_toc_id_169">Vestibular disorders</h2>
+
+	  <p>There’s an a11y “issue” which is quite unknown, but may impact a lot of people, either temporarily or permanently: vestibular disorders.</p>
+
+	  <p>To put it simply, some interactions can make the user dizzy, uneasy, and in some cases ruin her/his entire day, because the user feels like they can’t keep balance when walking or even staying up, or feel vertigo. <a href="https://source.opennews.org/articles/motion-sick/">See this article</a> for further details and illustrations.</p>
+
+	  <p><strong>At the very minimum, allow the user to disable animations which may create effects (e.g.&#160;page-transition animation).</strong> But everything else will vary from implementation to implementation.</p>
+
+	  <p>On iOS/Mac, there’s a system setting which has been implemented and <a href="https://webkit.org/blog/7551/responsive-design-for-motion/">browsers increasingly support the prefers-reduced-motion media query</a> to design accordingly.</p>
+
+	  <p>There’s little we can do about interactive EPUB contents themselves, but we can at least promote what Mozilla got wonderfully right from the start to authors, i.e. <a href="http://devtoolschallenger.com">an overlay asking users to set their preference</a>.</p>
+</section>
+
     <section id="internationalization" class="level2">
       <h2 id="sigil_toc_id_142">Internationalization</h2>
 

docs/ReadiumCSS_docs/OEBPS/Text/Section-013.xhtml

@@ -169,7 +169,7 @@
 
           <p>This item designates the position (index) of the publication in this series.</p>
 
-          <p>It can be a floating point number with up to two digits of precision e.g. <code>1.01</code>, and zero and negative numbers are allowed.</p>
+		  <p>It can be a floating point number with up to two digits of precision e.g. <code>1.01</code>, and zero and negative numbers are allowed.</p>
         </section>
 
         <section id="rating" class="level4">

docs/ReadiumCSS_docs/OEBPS/Text/Section-021.xhtml

@@ -355,6 +355,9 @@
         <li>
           <a href="../Text/Section-013.xhtml#sigil_toc_id_100">Current a11y Features on the market</a>
         </li>
+        <li>
+          <a href="../Text/Section-013.xhtml#sigil_toc_id_169">Vestibular disorders</a>
+        </li>		
         <li>
           <a href="../Text/Section-013.xhtml#sigil_toc_id_142">Internationalization</a>
         </li>

docs/ReadiumCSS_docs/OEBPS/Text/nav.xhtml

@@ -8,7 +8,7 @@
     <dc:language>en</dc:language>
     <dc:identifier id="epub-id-1">urn:uuid:91cab77e-946f-4814-9e61-8494a5d5cb0f</dc:identifier>
     <meta name="cover" content="cover_jpg"/>
-    <meta property="dcterms:modified">2019-02-20T15:08:53Z</meta>
+    <meta property="dcterms:modified">2019-06-13T18:30:22Z</meta>
     <meta content="0.9.5" name="Sigil version"/>
   </metadata>
   <manifest>