<!DOCTYPE rdf:RDF [
    <!ENTITY owl "http://www.w3.org/2002/07/owl#" >
    <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >
    <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#" >
    <!ENTITY otherOnt "http://example.org/otherOntologies/families/" >
]>

 <rdf:RDF xml:base="http://example.com/owl/families/"
   xmlns="http://example.com/owl/families/"
   xmlns:otherOnt="http://example.org/otherOntologies/families/"
   xmlns:owl="http://www.w3.org/2002/07/owl#"
   xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema#">

   <owl:Ontology rdf:about="http://example.com/owl/families">
     <!-- owl:imports rdf:resource="http://example.org/otherOntologies/families.owl" / -->
   </owl:Ontology>
   
  <rdf:Description rdf:about="personAge">
     <rdf:type rdf:resource="&rdfs;Datatype" />
     <owl:equivalentClass>
       <rdfs:Datatype>
         <owl:onDatatype rdf:resource="http://www.w3.org/2001/XMLSchema#integer"/>
         <owl:withRestrictions rdf:parseType="Collection">
           <rdf:Description>
             <xsd:minInclusive rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">0</xsd:minInclusive>
           </rdf:Description>
           <rdf:Description>
             <xsd:maxInclusive rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">150</xsd:maxInclusive>
           </rdf:Description>
         </owl:withRestrictions>
       </rdfs:Datatype>
     </owl:equivalentClass>
   </rdf:Description>
   
   <rdf:Description rdf:about="majorAge">
     <rdf:type rdf:resource="&rdfs;Datatype" />
     <owl:equivalentClass>
       <rdfs:Datatype>
         <owl:intersectionOf rdf:parseType="Collection">
           <rdf:Description rdf:about="personAge"/>
           <rdfs:Datatype>
             <owl:datatypeComplementOf rdf:resource="minorAge"/>
           </rdfs:Datatype>
         </owl:intersectionOf>
       </rdfs:Datatype>
     </owl:equivalentClass>
   </rdf:Description>
</rdf:RDF>
