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owl:equivalentClass and rds:subClassOf

From: Bernard Vatant <bernard.vatant@mondeca.com>
Date: Mon, 12 Jan 2004 11:53:15 +0100
To: <www-rdf-logic@w3.org>
Cc: "Holger Knublauch" <holger@SMI.Stanford.EDU>
Message-ID: <GOEIKOOAMJONEFCANOKCAEPLDAAA.bernard.vatant@mondeca.com>

Follow-up of a debate in Protégé list.

Holger Knublauch wrote:

"... in Protege there is no way to distinguish between

 :A rdfs:subClassOf :B
 :B rdfs:subClassOf :A


 :A owl:equivalentClass :B

because they are internally mapped into mutual superclasses..."

The reciprocal rdfs:subClassOf declares a logical equivalence of definition
(intensional), whereas owl:equivalentClass declares an equivalence at
instance level (extensional).

Should those declarations be kept distinct or not by a conformant OWL tool?
And if yes, what would be the logical relationship, if any, between the
former and the latter?

Bernard Vatant
Senior Consultant
Knowledge Engineering
Mondeca - www.mondeca.com
Received on Monday, 12 January 2004 05:55:46 UTC

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