Null pointer exception in validator

From: Giovanni Tummarello <giovanni.tummarello@deri.org> Date: Tue, 05 Jun 2007 12:23:27 +0100 To: www-rdf-validator@w3.org Message-id: <466547AF.1090709@deri.org> · This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 27 October 2009 08:36:33 GMT

Greetings,
submitting this:

<?xml version="1.0"?>
<rdf:RDF
    xmlns:swcrawlingonto="http://sindice.com/swcrawlingonto#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    >

 <swcrawlingonto:Dataset rdf:about="http://example.org/catalogue">
    <swcrawlingonto:dataDumpLocation 
rdf:resource="http://example.org/cataloguedump.rdf"/>
<swcrawlingonto:sparqlEndpointLocation 
rdf:resource="http://example.org/queryengine/sparql">
<rdfs:label>Our primary Sparql endpoint</rdfs:label>
</swcrawlingonto:sparqlEndpointLocation>

<swcrawlingonto:sparqlEndpointLocation 
rdf:resource="http://BACKUP.example.org/queryengine/sparql">
<rdfs:label>A backup Sparql endpoint you might want to use 
alternatively</rdfs:label>
</swcrawlingonto:sparqlEndpointLocation>
</swcrawlingonto:Dataset>

</rdf:RDF>

i get a Parser Loading Error
Exception parsing: java.lang.NullPointerException ?
Sincerely
Giovanni