XML Embedded in XSL Embedded in XML

I seem to have a catch-22 here that my mind can't get around, as I try to 
convert from hard-coded html to XSL.  I've got an XML file with a ref to an 
XSL, eg.

<?xml-stylesheet type="text/xsl" href="Test.xsl"?>
<xml> ... </xml>

The stylesheet has all the usual stuff, but also this attribute:

<xml id="Info" src="h:\temp\dccase.xml" />

My problem is that I *want* the src to be is the very XML document that called 
the XSL in the first place.  How would I do that?

Thanks,

Eric

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