> I am trying to do something quite similar:

>    <xsl:apply-templates select="document($uri)$xpointer" 
> , you can't do that.

You could do

 <xsl:apply-templates select="document(concat($uri,'#',$xpointer))">

If your xsl engine understood URI references using using xpointer
fragments (but I don't think any do yet).

David


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