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Re: model theory for RDF/S

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Tue, 9 Oct 2001 17:52:14 -0500
Message-Id: <p05101038b7e92ed10aac@[205.160.76.193]>
To: David Allsopp <d.allsopp@signal.qinetiq.com>
Cc: www-rdf-logic@w3.org
>Pat Hayes wrote:
>
>
>>  >>  rdf:type rdf:range rdfs:Class .
>>  >>
>>  >>  Indeed, there seems to be no way to generate that, which should of
>>  >>  course be in every closure. Damn, you are right. And of course also:
>>  >>
>>  >>  rdfs:subClassOf rdf:range rdfs:Class .
>>  >>  rdfs:subClassOf rdf:domain rdfs:Class .
>>  >  > rdf:range rdf:domain rdfs:Property .
>>  >>  rdf:range rdf:range rdfs:Class .
>>  >>  rdf:domain rdf:domain rdfs:Property .
>>  >>  rdf:domain rdf:range rdfs:Class .
>
>
>Pat,
>
>Should there also be, for each Resource uuu of type Class, the triple
>
>uuu rdfs:subClassOf uuu
>
>I assume this _is_ trivially true, now that subClass cycles are
>permitted?

Hmm, interesting point, I hadnt noticed that case. Thanks for raising 
it. Actually I think this is not strictly required by the model 
theory in its current incarnation, though it probably should be.

Let me get back to you on that.

Pat Hayes
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Received on Tuesday, 9 October 2001 18:52:15 GMT

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