<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:ex="http://example.org/ns/">

  <!-- A property must have only one node value -->

  <rdf:Description rdf:about="http://example.org/node0">
    <ex:mainprop>

       <rdf:Description>
	 <ex:prop1>val1</ex:prop1>
       </rdf:Description>

       <rdf:Description>
	 <ex:prop2>val2</ex:prop2>
       </rdf:Description>

    </ex:mainprop>
  </rdf:Description>

</rdf:RDF>