<owl:Ontology xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
   xmlns:owl="http://www.w3.org/2002/07/owl#"
   xmlns:f="foo://bla/"
   xml:base="foo://bla/">
  <owl:Declaration>
    <owl:OWLClass owl:URI="#animal"/>
  </owl:Declaration>
  <owl:Declaration>
    <owl:ObjectProperty owl:URI="#eats"/>
  </owl:Declaration>
</owl:Ontology>