OWL Web Ontology Language Overview

DatatypeProperty</a>). Both
owl:ObjectProperty and
owl:DatatypeProperty are
<a href="http://www.w3.org/TR/owlref/#ObjectProperty-def">subclasses</a>
of the RDF class rdf:Property.
</li>
<li>
<b><i><a id="subPropertyOf"
name="subPropertyOf"></a><a
href="http://www.w3.org/TR/owl-