I think, this is a strange behaviour, too. Isn't only one nodeset created
with

<xsl:variable name="set" select="document(/files/node/@path)"/> 
(You don't need the extension-function.)?

On which key('k-id',@id)[1] should only return the first node and always
return the same first node?

Only the working with a RTF and the nodeset-extension works as expected:
(I tried it with Xalan and MSXML.)

<xsl:variable name="settemp"> 
    <xsl:for-each select="/files/node"> 
        <xsl:copy-of select="document(@path)"/> 
    </xsl:for-each> 
</xsl:variable> 

<xsl:variable name="set" select="xalan:nodeset($settemp)"/> 

Is it correct how MSXML and Xalan behave?

Joerg

>  As far as I can tell, when using a key() with the MSXML4 extention
>  node-set(),
>  the call to key('key-name', val)[1] does not always return the same node
for
>  a constant val.
> 
>  I have this stylesheet:
> 
>  <?xml version="1.0" encoding="UTF-8" ?>
>  <xsl:stylesheet version="1.0"
>  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>  xmlns:msxsl="urn:schemas-microsoft-com:xslt">
> 
>  <xsl:variable name="set"
>  select="msxsl:node-set(document(/files/node/@path))"/>
>  <xsl:key name="k-id" match="person" use="@id" />
> 
>  <xsl:template name="distinct">
>          <xsl:for-each select="$set/doc/person[@id='4']">
>              <info self-id="{generate-id(.)}"
>  index-id="{generate-id(key('k-id',@id)[1])}">
>                  <self>
>                      <xsl:copy-of select="."/>
>                  </self>
>                  <index>
>                      <xsl:copy-of select="key('k-id',@id)[1]" />
>                  </index>
>              </info>
>          </xsl:for-each>
>  </xsl:template>
> 
>  <xsl:template match="/">
>  <test>
>  <xsl:call-template name="distinct" />
>  </test>
>  </xsl:template>
>  </xsl:stylesheet>
> 
>  And two input files:
> 
>  -------------------------------------------
>  input1.xml
>  <?xml version="1.0" encoding="utf-8" ?>
>   <doc>
>          <person name="onePerson" id="4" />
>  </doc>
>  -------------------------------------------
>  input2.xml
>  <?xml version="1.0" encoding="utf-8" ?>
>   <doc>
>          <person name="otherPerson" id="4" />
>  </doc>
>  -----------------------------------------------
>  When I run my stilesheet I get:
> 
>   <?xml version="1.0" encoding="UTF-16" ?>
>  - <test xmlns:msxsl="urn:schemas-microsoft-com:xslt">
>  - <info self-id="IDAUQ2N" index-id="IDAUQ2N">
>  -     <self>
>            <person name="onePerson" id="4" />
>        </self>
>  -     <index>
>            <person name="onePerson" id="4" />
>        </index>
>        </info>
>  -         <info self-id="IDAIY2N" index-id="IDAIY2N">
>  -     <self>
>            <person name="otherPerson" id="4" />
>        </self>
>  -     <index>
>            <person name="otherPerson" id="4" />
>        </index>
>        </info>
>    </test>
> 
>  It looks like there is a seperate key for each tree-fragment in the
>  node-set.
>  Did I miss something, or is this a known problem?
> 
>  -alex


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list