<rdf:RDF
    xmlns:emp="http://emp/"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf123="http://rdf123.umbc.edu/ns/">
  <rdf123:Map rdf:about="">
    <dc:creator>Lushan Han</dc:creator>
    <dc:title>employee map file</dc:title>
  </rdf123:Map>
  <foaf:Person>
    <foaf:name>Ex:$1^^string</foaf:name>
    <foaf:mbox>Ex:$2^^string</foaf:mbox>
    <emp:supervisor>
      <foaf:Person>
        <foaf:name>Ex:$4^^string</foaf:name>
      </foaf:Person>
    </emp:supervisor>
    <foaf:phonenumber>Ex:$3</foaf:phonenumber>
  </foaf:Person>
</rdf:RDF>