& XSLT Hi drkm,

thank you for your reply! You are right, I chose the wrong attribute. 

After restructuring the xsl file I am able to follow the aggregations in the
XMI-file by recursion. If someone is interested, the working file follows.
Any hints on best practices regarding modularity or structure will be
appreciated!

<?xml version="1.0" encoding="UTF-8"?> 
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="2.0" xmlns:UML="org.omg.xmi.namespace.UML"
exclude-result-prefixes="UML"> 
<xsl:output method="xml" encoding="UTF-8" indent="yes" /> 
  
  <!-- *** <Keys>  ************************************************ -->
  <xsl:key name="stereotype_by_name" match="UML:Stereotype" use="@name" /> 
  <xsl:key name="class_by_stereotypeReference" match="UML:Class"
use="UML:ModelElement.stereotype/UML:Stereotype/@xmi.idref" /> 
  <xsl:key name="class_by_id" match="UML:Class" use="@xmi.id" /> 
  <xsl:key name="aggregation_by_classReference" match="UML:Association"
use="UML:Association.connection/UML:AssociationEnd[@aggregation='none']/UML:AssociationEnd.p
articipant/UML:Class/@xmi.idref"
/> 
  <!-- *** </Keys>  *********************************************** -->

  
  <xsl:template match="/"> 
    <!-- apply templates on all stereotypes "dokument" --> 
    <xsl:apply-templates select="key('stereotype_by_name', 'dokument')"
mode="compute_fileName" /> 
  </xsl:template> 

  <!-- expects one and only one node --> 
  <xsl:template match="UML:Stereotype" mode="compute_fileName"> 
    <!-- apply templates on all classes of this stereotype --> 
    <xsl:apply-templates select="key('class_by_stereotypeReference',
@xmi.id)" mode="compute_fileName" /> 
  </xsl:template> 

  <xsl:template match="UML:Class" mode="compute_fileName"> 
    <xsl:for-each select="."> 
      <xsl:variable name="path"> 
        <xsl:call-template name="compute_path"> 
          <xsl:with-param name="class_id" select="@xmi.id" /> 
        </xsl:call-template> 
      </xsl:variable> 
      <xsl:result-document href="{concat($path,'.xml')}"> 
        <!-- create the document´s content, located in another stylesheet
--> 
        <xsl:call-template name="create_document"> 
          <xsl:with-param name="class_id" select="@xmi.id"/> 
        </xsl:call-template> 
      </xsl:result-document> 
    </xsl:for-each> 
  </xsl:template> 

  <!-- recursion to build a path from a leaf to the tree´s root (in the UML
model, by following the aggregations) --> 
  <xsl:template name="compute_path"> 
    <xsl:param name="class_id" /> 
    <xsl:variable name="temp"
select="key('aggregation_by_classReference',$class_id)" /> 
    <xsl:choose> 
      <!-- inverse Termination Condition --> 
      <!-- if the root is not reached, e.g. an aggregation leads to another
class --> 
      <xsl:when
test="$temp/UML:Association.connection/UML:AssociationEnd[@aggregation='aggregate']/UML:Asso
ciationEnd.participant/UML:Class"> 
        <!-- Recursive Descent --> 
        <!-- then call the recursion again with the connected class_id --> 
        <xsl:variable name="recursive_result"> 
          <xsl:call-template name="compute_path"> 
            <xsl:with-param name="class_id"
select="$temp/UML:Association.connection/UML:AssociationEnd[@aggregation='aggregate']/UML:As
sociationEnd.participant/UML:Class/@xmi.idref"
/> 
          </xsl:call-template> 
        </xsl:variable> 
        <!-- Recursive Ascent --> 
        <xsl:value-of
select="concat($recursive_result,'/',key('class_by_id',$class_id)/@name)" /> 
      </xsl:when> 
      <!-- Termination Condition --> 
      <xsl:otherwise> 
        <!-- root class is reached, so terminate the descent --> 
        <xsl:value-of select="key('class_by_id',$class_id)/@name" /> 
      </xsl:otherwise> 
    </xsl:choose> 
  </xsl:template> 

</xsl:stylesheet> 



----- Original Message -----
From: darkman_spam@[...].fr <Florent Georges> 
To: xsl-list@[...].com

>    The 'Association.connection' doesn't have a @xmi.id.  Maybe you want
>  its ../@xmi.id.  If I use this (see the "../"):
>  
>      <xsl:value-of
>          select="key('aggregation_by_classReference',./@xmi.id)
>                    / ../@xmi.id"/>
>  
>  Saxon output (with the text output method):
>  
>      Aggregation_id_1
>  
>    Is it the expected behaviour?
>  
>  --drkm
>  

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