Enumeration in XML:

  <rdf:Property rdf:ID="ChartType">
     <rdf:range>
         <owl:Class>
             <owl:oneOf rdf:parseType="Collection">
                 <owl:Thing rdf:ID="Bar"/>
                 <owl:Thing rdf:ID="Pie"/>
                 <owl:Thing rdf:ID="Radar"/>
                 …
             </owl:oneOf>
         </owl:Class>
     </rdf:range>
  </rdf:Property>