<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE rdf:RDF [
   <!ENTITY foo 'abc'>
   <!ENTITY bar 'def'>
]>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <rdf:Description rdf:about="http://example.org/resource"
        rdf:value="&foo;">
     <rdf:value>&bar;</rdf:value>
  </rdf:Description>
</rdf:RDF>
