<x xmlns:xi="http://www.w3.org/2001/XInclude"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xi:include href="test.xslt"
    xpointer="xmlns(xsl=http://www.w3.org/1999/XSL/Transform)xpointer(//p)"/>
</x>