Setup the XSLT transformation:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
                xmlns:fo="http://www.w3.org/1999/XSL/Format"
                xmlns:s="urn:publicid:IDN+mathdoc.org:schema:slides:2004:1.0:us"
                xmlns:md="urn:publicid:IDN+mathdoc.org:schema:common:2004:1.0:us"
                xmlns:h="http://www.w3.org/1999/xhtml"
                >
<xsl:output method="xml"/>

</xsl:stylesheet>

The namespace for the output FO vocabulary is http://www.w3.org/1999/XSL/Format

We'll have to run the result through an XSL aware formatter (e.g. FOP).