[xsl] keys and idrefs

[DPawson@xxxxxxxxxxx]

With XML such as
 <process id="schemaDesign" layer="datalayer" control="XAG
systemArchitecture" input="systemSpec ">
    <name>Schema Design</name>
      </process>

and lots of similar,

then lots of <document elements>

   <document id="XAG" layer="WAI" >
	<name>XML Guidelines</name>
      </document>


I.e. the idrefs (control attribute on <process>) point to the controlling
documents.

I'm trying to present the list of processes controlled by the document in an
html para.
in the template for 'document' I'm using the hack

  <xsl:template match="document">
      <xsl:variable name="thisDoc" select="@id"/>
.....
 <p> Controls: 
              <xsl:for-each
select="id(//process|//document[@control='$thisDoc'])">
                <a href="{@id}.html"> <xsl:value-of select="name"/>
</a>&#160;
              </xsl:for-each>
            </p>


I feel that keys should be usable here, and can't figure out how.
If I have a key match on document use = @control
I should be able to for-each over them to achieve the same result, 
but I couldn't figure it out.
the id's are ID's btw.

Any help appreciated.

Regards DaveP





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