diff --git a/eo-parser/src/main/resources/org/eolang/parser/parse/expand-aliases.xsl b/eo-parser/src/main/resources/org/eolang/parser/parse/expand-aliases.xsl
index 91437e9823..98d616590f 100644
--- a/eo-parser/src/main/resources/org/eolang/parser/parse/expand-aliases.xsl
+++ b/eo-parser/src/main/resources/org/eolang/parser/parse/expand-aliases.xsl
@@ -35,18 +35,35 @@ SOFTWARE.
   -->
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/program/metas/meta[head='alias']">
-    <xsl:variable name="expanded" select="contains(tail, ' ')"/>
+    <xsl:variable name="composite" select="contains(tail, ' ')"/>
+    <xsl:variable name="split" select="tokenize(tail/text(), ' ')"/>
     <xsl:variable name="last">
       <xsl:choose>
-        <xsl:when test="$expanded">
-          <xsl:value-of select="tokenize(tail/text(), ' ')[last()]"/>
+        <xsl:when test="$composite">
+          <xsl:value-of select="$split[last()]"/>
         </xsl:when>
         <xsl:otherwise>
           <xsl:value-of select="tail/text()"/>
         </xsl:otherwise>
       </xsl:choose>
     </xsl:variable>
-    <xsl:variable name="parts" select="tokenize($last, '\.')"/>
+    <xsl:variable name="first">
+      <xsl:choose>
+        <xsl:when test="$composite">
+          <xsl:value-of select="$split[1]"/>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:choose>
+            <xsl:when test="contains($last, '.')">
+              <xsl:value-of select="tokenize($last, '\.')[last()]"/>
+            </xsl:when>
+            <xsl:otherwise>
+              <xsl:value-of select="tail/text()"/>
+            </xsl:otherwise>
+          </xsl:choose>
+        </xsl:otherwise>
+      </xsl:choose>
+    </xsl:variable>
     <xsl:variable name="tail">
       <xsl:if test="not(starts-with($last, 'Q.'))">
         <xsl:text>Q.</xsl:text>
@@ -56,13 +73,26 @@ SOFTWARE.
     <xsl:copy>
       <xsl:apply-templates select="node() except tail except part|@*"/>
       <xsl:element name="tail">
-        <xsl:value-of select="$parts[last()]"/>
+        <xsl:value-of select="$first"/>
+        <xsl:if test="$composite">
+          <xsl:for-each select="$split[position()&gt;1 and position()!=last()]">
+            <xsl:text> </xsl:text>
+            <xsl:value-of select="."/>
+          </xsl:for-each>
+        </xsl:if>
         <xsl:text> </xsl:text>
         <xsl:value-of select="$tail"/>
       </xsl:element>
       <xsl:element name="part">
-        <xsl:value-of select="$parts[last()]"/>
+        <xsl:value-of select="$first"/>
       </xsl:element>
+      <xsl:if test="$composite">
+        <xsl:for-each select="$split[position()&gt;1 and position()!=last()]">
+          <xsl:element name="part">
+            <xsl:value-of select="."/>
+          </xsl:element>
+        </xsl:for-each>
+      </xsl:if>
       <xsl:element name="part">
         <xsl:value-of select="$tail"/>
       </xsl:element>
diff --git a/eo-parser/src/main/resources/org/eolang/parser/parse/resolve-aliases.xsl b/eo-parser/src/main/resources/org/eolang/parser/parse/resolve-aliases.xsl
index a7444ae51b..45f9dfffb2 100644
--- a/eo-parser/src/main/resources/org/eolang/parser/parse/resolve-aliases.xsl
+++ b/eo-parser/src/main/resources/org/eolang/parser/parse/resolve-aliases.xsl
@@ -41,7 +41,7 @@ SOFTWARE.
         <xsl:variable name="meta" select="/program/metas/meta[head='alias' and part[1] = $o/@base]"/>
         <xsl:choose>
           <xsl:when test="$meta">
-            <xsl:variable name="tail" select="$meta/part[2]"/>
+            <xsl:variable name="tail" select="$meta/part[last()]"/>
             <xsl:value-of select="$tail[1]"/>
           </xsl:when>
           <xsl:otherwise>
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/expand-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/expand-aliases.yaml
index c79b41f9c9..8d33665c25 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/expand-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/expand-aliases.yaml
@@ -27,9 +27,13 @@ asserts:
   - /program[not(errors)]
   - //meta[head='alias' and tail='scanner Q.org.eolang.txt.scanner' and part[1]='scanner' and part[2]='Q.org.eolang.txt.scanner']
   - //meta[head='alias' and tail='stdin Q.org.eolang.io.stdin' and part[1]='stdin' and part[2]='Q.org.eolang.io.stdin']
+  - //meta[head='alias' and tail='a b Q.c' and part[1]='a' and part[2]='b' and part[3]='Q.c']
+  - //meta[head='alias' and tail='a b c e Q.f' and part[1]='a' and part[2]='b' and part[3]='c' and part[4]='e' and part[5]='Q.f']
 input: |
   +alias org.eolang.txt.scanner
   +alias stdin org.eolang.io.stdin
+  +alias a b c
+  +alias a b c e f
 
   # No comments.
   [args] > main
diff --git a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/resolve-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/resolve-aliases.yaml
index 1e5849a283..b3ea4b6730 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/resolve-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/eo-packs/parse/resolve-aliases.yaml
@@ -29,17 +29,21 @@ sheets:
 asserts:
   - /program[not(errors)]
   - /program/objects[count(o)=1]
-  - /program/metas/meta[head='foo' and @line='4']
-  - /program/metas[count(meta)=4]
+  - /program/metas/meta[head='foo']
+  - /program/metas[count(meta)=6]
   - //o[@base='Q.org.eolang.txt.scanner']
-  - //o[@base='Q.org.eolang.io.stdout' and @line='10']
-  - //o[@base='and' and @line='8']
+  - //o[@base='Q.org.eolang.io.stdout']
+  - //o[@base='and']
   - //o[@base='$']
   - //o[@base='^']
+  - //o[@base='Q.org.eolang.txt.regex']
+  - //o[@base='Q.org.d']
 input: |
   +alias org.eolang.txt.scanner
   +alias stdin org.eolang.io.stdin
   +alias stdout org.eolang.io.stdout
+  +alias custom org.eolang.txt.regex
+  +alias a b c org.d
   +foo Some other meta
 
   # No comments.
@@ -49,3 +53,5 @@ input: |
       (stdout "You entered" line).print
       ^.x
       $
+      custom 5
+      a