RE: XML IDREFs

> How would I do a
> cross-reference with different xml files?  Is there a
> way?  Is it even possible?

It's possible in XSLT 2.0, provided you have a schema:

<xsl:document validate="lax">
 <wrapper>
  <xsl:copy-of select="document('doc1.xml')"/>
  <xsl:copy-of select="document('doc2.xml')"/> 
 </wrapper>
</xsl:document> 

Michael Kay
http://www.saxonica.com/