exsl:document issue

Right now I am using exsl:document as follows with libxml/xsltproc:

<exsl:document href="{$filename}" method="xml" encoding="UTF-8"
  doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"
  doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Yet the output file only gives:

<?xml version="1.0" encoding="UTF-8"?>

http://www.in-nomine.org/~asmodai/df/conformance/conformance.xsd
http://www.in-nomine.org/~asmodai/df/conformance/conformance.xml
http://www.in-nomine.org/~asmodai/df/conformance/conformance.xsl

What am I missing that is evading me?

Thanks in advance,

--
Jeroen Ruigrok van der Werven <asmodai(at)wxs.nl> / asmodai / kita no mono
Free Tibet! http://www.savetibet.org/ | http://ashemedai.deviantart.com/
http://www.tendra.org/   | http://www.in-nomine.org/
Fame is the perfume of heroic deeds...