RDF Schema Example

   <?xml version="1.0"?> 
   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
            xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">

   <rdfs:Class rdf:ID="Person">
     <rdfs:comment>Person Class</rdfs:comment>
     <rdfs:subClassOf 
          rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Resource"/>
   </rdfs:Class>

   <rdfs:Class rdf:ID="Student">
     <rdfs:comment>Student Class</rdfs:comment>
     <rdfs:subClassOf rdf:resource="#Person"/>
   </rdfs:Class>

   <rdfs:Class rdf:ID="Teacher">
     <rdfs:comment>Teacher Class</rdfs:comment>
     <rdfs:subClassOf rdf:resource="#Person"/>
   </rdfs:Class>

   <rdfs:Class rdf:ID="Course">
     <rdfs:comment>Course Class</rdfs:comment>
     <rdfs:subClassOf rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Resource"/>
   </rdfs:Class>

   <rdf:Property rdf:ID="teacher">
      <rdfs:comment>Teacher of a course</rdfs:comment>
      <rdfs:domain rdf:resource="#Course"/>	      
      <rdfs:range rdf:resource="#Teacher"/>	      
   </rdf:Property>

   <rdf:Property rdf:ID="students">
      <rdfs:comment>List of Students of a course in alphabetical order</rdfs:comment>
      <rdfs:domain rdf:resource="#Course"/>	      
      <rdfs:range rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq"/>
   </rdf:Property>

   <rdf:Property rdf:ID="name">
      <rdfs:comment>Name of a Person or Course</rdfs:comment>
      <rdfs:domain rdf:resource="#Person"/>	      
      <rdfs:domain rdf:resource="#Course"/>	      
      <rdfs:range rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Literal"/>	      
   </rdf:Property>

   </rdf:RDF>