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RE: Representation of Negative Assertions in OWL 1.0

From: Kashyap, Vipul <VKASHYAP1@PARTNERS.ORG>
Date: Mon, 9 Jun 2008 06:53:53 -0400
Message-ID: <DBA3C02EAD0DC14BBB667C345EE2D12402948826@PHSXMB20.partners.org>
To: "Alan Ruttenberg" <alanruttenberg@gmail.com>
Cc: "Christine Golbreich" <cgolbrei@gmail.com>, "OWL Working Group WG" <public-owl-wg@w3.org>

> > I think the Demorgan Law was not applied properly.
> > I think what Christine probably had in mind was the following  
> > expression;
> >
> > Individual(Sarkozy type(ObjectComplementOf(ObjectSomeValuesFrom 
> > (isPresidentOf
> > ObjectOneOf(USA)))))
> I've added this expression to http://purl.org/science/owl2/examples/ 
> president.owl
> You can see it is equivalent to the two earlier ones.

The interesting issue is out of these three logically equivalent expressions,
Of these is more intuitive to an ontology engineer who is not trained in logic.

More interestingly, it highlights the value of introducing syntatic sugar for
negative property assertions.



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Received on Monday, 9 June 2008 10:54:35 UTC

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