Funny headline !?
As i have written in a longer article (german) on www.devtrain.de, i searched for a way to display RDF data (which includes namespaces rdf:RDF) with xmldatasource. XMLDatasource can not handle namespaces in xpath.
Following XSL converts it to RSS which solves the problem
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
<xsl:template match="/">
<rss>
<xsl:for-each select="/*/*[name()='item']">
<item>
<title> <xsl:value-of select="child::*[name()='title']"/></title>
</item>
</xsl:for-each>
</rss></xsl:template>
</xsl:stylesheet>