parsing RDF/XML sub-part with stax, using Jena?

[Eric Feliksik]

Dear Jena fanatics,

I am parsing an xml document and RDF/XML can be contained as a subtree, as
follows:

<?xml version='1.0' encoding='utf-8'?>
<myFormat>
  <myGraphAnnouncer>
      <rdf:RDF
        xmlns:j.0="http://dbpedia.org/property/"; >
      <rdf:Description rdf:about="
http://dbpedia.org/resource/Geert_den_Ouden";>
        <j.0:cityofbirth rdf:resource="http://dbpedia.org/resource/Delft"/>
        <j.0:placeOfBirth rdf:resource="http://dbpedia.org/resource/Delft"/>
      </rdf:Description>
    </rdf:RDF>
  </myGraphAnnouncer>
</myFormat>

I am using the Stax parser to process my document. As soon as i find the
<myGraphAnnouncer> tag, I want to hand the responsibility of parsing to Jena
as it already implements this.
Is there a Stax implementation that I could directly pass the stax
javax.xml.stream.XMLStreamReader ? Sharing the inputStream seem to quickly
become complex, as various parsers may buffer the input in their own
particular ways. I prefer a streaming solution as the document may become
many megabytes in size.

Does Jena have a Stax RDF parsing implementation? If not, do you have any
advice? Thanks in advance!
Regards,
Eric