question on rdfs:domain

Is the following construct valid in owl:

<owl:ObjectProperty rdf:ID="someProperty">
    <rdfs:domain>
      <owl:Class>
        <owl:unionOf rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#nil"/>
      </owl:Class>
    </rdfs:domain>
</owl:ObjectProperty>

The above construct is defining a property with an empty domain which doesn't make much sense.  What I am looking for is a place in the specifications (if any) that says that such a construct is valid/invalid.  

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Received on Saturday, 19 February 2005 05:07:21 UTC