RDQL Support

RDF Twig now supports RDQL:

<xsl:variable name="a">
  <rq:rdql return="a">
SELECT ?a, ?b
WHERE  (?a, &lt;http://somewhere/pred1&gt;, ?b)
AND    ?b < 5
  </rq:rdql>
</xsl:variable>

This is a result tree, so you need a node-set extension to access it.