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

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

  <rdf:Description rdf:about="http://example.org/node1">
    <ex:prop1>
      <rdf:Description rdf:about="http://example.org/node2"/>
      <rdf:Description rdf:about="http://example.org/node3"/>
    </ex:prop1>
  </rdf:Description>

</rdf:RDF>
