[Tracker] Is this RDF query correct?

[Laurent Aguerreche <laurent aguerreche free fr>]

Hello,

I try to use this RDF query:

<rdfq:Condition>
  <rdfq:and>

    <rdfq:or>

      <rdfq:contains>
        <rdfq:Property name="Doc.Title" />
        <rdf:String>opengl</rdf:String>
      </rdfq:contains>

      <rdfq:contains>
        <rdfq:Property name="Doc.Subject" />
        <rdf:String>opengl</rdf:String>
      </rdfq:contains>

      <rdfq:contains>
        <rdfq:Property name="Doc.Keywords" />
        <rdf:String>opengl</rdf:String>
      </rdfq:contains>

      <rdfq:contains>
        <rdfq:Property name="Doc.Comments" />
        <rdf:String>opengl</rdf:String>
      </rdfq:contains>

    </rdfq:or>

    <rdfq:contains>
      <rdfq:Property name="File.Format" />
      <rdf:String>pdf</rdf:String>
    </rdfq:contains>

  </rdfq:and>
</rdfq:Condition>


and it fails with this message :

Error in rdf query parse: Line 12 character 1: CONTAINS element not
expected here


What is the problem? How can I do a OR between numerous 'contains'
encapsulated itself in a AND? Is it legal?


Laurent.