diff --git a/eo-integration-tests/src/test/resources/org/eolang/snippets/compact-array.yaml b/eo-integration-tests/src/test/resources/org/eolang/snippets/compact-array.yaml
new file mode 100644
index 00000000000..d63fc547dae
--- /dev/null
+++ b/eo-integration-tests/src/test/resources/org/eolang/snippets/compact-array.yaml
@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+out:
+  - ".*Hello, 上海.*"
+file: program.eo
+args: ["org.eolang.snippets.program", "上海"]
+target: "eoc"
+eo: |
+  +alias org.eolang.io.stdout
+  +package org.eolang.snippets
+
+  [args] > program
+    io.stdout > @
+      tt.sprintf *1
+        "Hello, %s\n"
+        args.at 0
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/transpile-packs/compact-array.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/transpile-packs/compact-array.yaml
new file mode 100644
index 00000000000..6719dd1c732
--- /dev/null
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/transpile-packs/compact-array.yaml
@@ -0,0 +1,24 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets:
+  - /org/eolang/maven/transpile/set-locators.xsl
+  - /org/eolang/maven/transpile/set-original-names.xsl
+  - /org/eolang/maven/transpile/classes.xsl
+  - /org/eolang/maven/transpile/package.xsl
+  - /org/eolang/maven/transpile/attrs.xsl
+  - /org/eolang/maven/transpile/data.xsl
+  - /org/eolang/maven/transpile/to-java.xsl
+asserts:
+  - /object[not(errors)]
+  - //java[contains(text(), 'base="Φ.org.eolang.tt.sprintf"')]
+input: |
+  +alias org.eolang.io.stdout
+  +package org.eolang.snippets
+
+  [args] > program
+    io.stdout > @
+      tt.sprintf *1
+        "Hello, %s\n"
+        args.at 0
diff --git a/eo-parser/src/main/java/org/eolang/parser/CompactArrayFqn.java b/eo-parser/src/main/java/org/eolang/parser/CompactArrayFqn.java
index e8ac5d03242..19959bcdc53 100644
--- a/eo-parser/src/main/java/org/eolang/parser/CompactArrayFqn.java
+++ b/eo-parser/src/main/java/org/eolang/parser/CompactArrayFqn.java
@@ -46,17 +46,13 @@ public String asString() {
             .map(ParseTree::getText)
             .collect(Collectors.joining("."));
         final String fqn;
-        if (this.context.HOME() == null) {
+        if (this.context.HOME() == null && this.context.XI() == null) {
             fqn = name;
-        } else {
+        } else if (this.context.HOME() != null && this.context.XI() == null) {
             fqn = String.format("Φ.org.eolang.%s", name);
-        }
-        final String base;
-        if (this.context.XI() == null) {
-            base = fqn;
         } else {
-            base = String.format("ξ.%s", fqn);
+            fqn = String.format("ξ.%s", name);
         }
-        return base;
+        return fqn;
     }
 }
diff --git a/eo-parser/src/main/resources/org/eolang/parser/parse/build-fqns.xsl b/eo-parser/src/main/resources/org/eolang/parser/parse/build-fqns.xsl
index 4ca4faceca1..50f6ee52849 100644
--- a/eo-parser/src/main/resources/org/eolang/parser/parse/build-fqns.xsl
+++ b/eo-parser/src/main/resources/org/eolang/parser/parse/build-fqns.xsl
@@ -185,6 +185,34 @@
       </xsl:otherwise>
     </xsl:choose>
   </xsl:template>
+  <!--
+    Here we go through all bases that match pattern: `foo.bar`, and resolve it's FQN:
+    1. If `oname` is defined in the current scope => `oname`
+    2. Else if an alias exists for `oname` => use FQN from alias
+    3. Otherwise => `Φ.org.eolang.oname`
+  -->
+  <xsl:template match="@base[matches(., '^\w+(?:\.\w+)+$') and not(starts-with(., 'Φ.')) and not(starts-with(., 'ξ'))]">
+    <xsl:variable name="q" select="."/>
+    <xsl:variable name="head" select="substring-before(concat($q, '.'), '.')"/>
+    <xsl:variable name="alias" select="/object/metas/meta[head='alias' and part[1]=$head]/part[last()]"/>
+    <xsl:choose>
+      <xsl:when test="parent::o/parent::o/o[@name = $head]">
+        <xsl:attribute name="base">
+          <xsl:value-of select="$q"/>
+        </xsl:attribute>
+      </xsl:when>
+      <xsl:when test="string-length($alias) &gt; 0">
+        <xsl:attribute name="base">
+          <xsl:value-of select="$alias"/>
+        </xsl:attribute>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:attribute name="base">
+          <xsl:value-of select="concat('Φ.org.eolang.', $q)"/>
+        </xsl:attribute>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
   <!-- ENTRY POINT -->
   <xsl:template match="o[@base]">
     <xsl:apply-templates select="." mode="with-base"/>
diff --git a/eo-parser/src/test/java/org/eolang/parser/CompactArrayFqnTest.java b/eo-parser/src/test/java/org/eolang/parser/CompactArrayFqnTest.java
index 0eb28412963..70fad753981 100644
--- a/eo-parser/src/test/java/org/eolang/parser/CompactArrayFqnTest.java
+++ b/eo-parser/src/test/java/org/eolang/parser/CompactArrayFqnTest.java
@@ -20,6 +20,7 @@ final class CompactArrayFqnTest {
     @CsvSource(
         {
             "foo *1,foo",
+            "tt.x *55,tt.x",
             "QQ.foo.bar *42,Φ.org.eolang.foo.bar",
             "QQ.nan *52,Φ.org.eolang.nan",
             "$.seq *1,ξ.seq"
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/validate-resolve-before-stars.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/validate-resolve-before-stars.yaml
index 10aa09a77d7..70d9f631118 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/validate-resolve-before-stars.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/validate-resolve-before-stars.yaml
@@ -10,27 +10,27 @@ asserts:
   - //o[@name='first' and count(o)=1]/o[@base='Φ.org.eolang.tuple' and @star and count(o)=2]
   - //o[@name='second' and count(o)=2]/o[position()=2 and @base='Φ.org.eolang.tuple' and @star and count(o)=2]
   - //o[@name='third' and count(o)=3]/o[position()=3 and @base='Φ.org.eolang.tuple' and @star and count(o)=1]
-  - //o[@name='fourth' and count(o)=2]/o[@base='sprintf' and count(o)=1]/o[@base='Φ.org.eolang.tuple' and @star and count(o)=2]
+  - //o[@name='fourth' and count(o)=2]/o[@base='Φ.org.eolang.tt.sprintf' and count(o)=1]/o[@base='Φ.org.eolang.tuple' and @star and count(o)=2]
   - //o[@name='fourth']/o[@base='Φ.org.eolang.tuple' and @star and count(o)=1]
   - /object[count(//o[@before-star])=0]
 input: |
   # No comments.
   [] > foo
-    sprintf *2 > with-error
+    QQ.tt.sprintf *2 > with-error
       x
-    sprintf * > first
+    QQ.tt.sprintf * > first
       x
       y
-    sprintf *1 > second
+    QQ.tt.sprintf *1 > second
       x
       y
       z
-    sprintf *2 > third
+    QQ.tt.sprintf *2 > third
       x
       y
       z
-    sprintf *1 > fourth
-      sprintf *
+    QQ.tt.sprintf *1 > fourth
+      QQ.tt.sprintf *
         x
         y
       z
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array-with-defined-first-part.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array-with-defined-first-part.yaml
new file mode 100644
index 00000000000..487e9a35e5c
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array-with-defined-first-part.yaml
@@ -0,0 +1,16 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets: []
+asserts:
+  - /object[not(errors)]
+  - //o[@base='foo.bar']/o[@base='Φ.org.eolang.x']
+  - //o[@base='foo.bar']//o[@base='Φ.org.eolang.y']
+input: |
+  # No comments.
+  [] > app
+    boom > foo
+    foo.bar *1 > @
+      x
+      y
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array.yaml
new file mode 100644
index 00000000000..64c3e174f25
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-array.yaml
@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets: []
+asserts:
+  - /object[not(errors)]
+  - //o[@base='Φ.org.eolang.tt.sprintf']
+input: |
+  +alias org.eolang.io.stdout
+  +package org.eolang.snippets
+
+  [args] > program
+    io.stdout > @
+      tt.sprintf *1
+        "Hello, %s\n"
+        args.at 0
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-sprintf-aliased.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-sprintf-aliased.yaml
new file mode 100644
index 00000000000..02598cc96e0
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/compact-sprintf-aliased.yaml
@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets: []
+asserts:
+  - /object[not(errors)]
+  - //o[@base='Φ.org.eolang.tt.sprintf']/o[@base='Φ.org.eolang.string']
+input: |
+  +alias org.eolang.io.stdout
+  +alias org.eolang.tt.sprintf
+
+  # No comments.
+  [args] > simple
+    stdout > @
+      sprintf *1
+        "Hello, %s"
+        args.at 0
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name-aliased.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name-aliased.yaml
new file mode 100644
index 00000000000..236061733f9
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name-aliased.yaml
@@ -0,0 +1,16 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets: []
+asserts:
+  - /object[not(errors)]
+  - //o[@base='Φ.org.eolang.foo.bar']/o[@base='Φ.org.eolang.x']
+  - //o[@base='Φ.org.eolang.foo.bar']//o[@base='Φ.org.eolang.y']
+input: |
+  +alias org.eolang.foo.bar
+
+  [] > app
+    bar *1 > @
+      x
+      y
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name.yaml
index cbe163e71ab..39b8c1e99a5 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-syntax/sugared-array-with-composite-name.yaml
@@ -5,8 +5,8 @@
 sheets: []
 asserts:
   - /object[not(errors)]
-  - //o[@base='foo.bar']/o[@base='Φ.org.eolang.x']
-  - //o[@base='foo.bar']//o[@base='Φ.org.eolang.y']
+  - //o[@base='Φ.org.eolang.foo.bar']/o[@base='Φ.org.eolang.x']
+  - //o[@base='Φ.org.eolang.foo.bar']//o[@base='Φ.org.eolang.y']
 input: |
   # No comments.
   [] > app