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RE: Representation of Negative Assertions in OWL 1.0

From: Kashyap, Vipul <VKASHYAP1@PARTNERS.ORG>
Date: Sun, 8 Jun 2008 18:38:26 -0400
Message-ID: <DBA3C02EAD0DC14BBB667C345EE2D1240294881C@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)))))

---Vipul

> -----Original Message-----
> From: Alan Ruttenberg [mailto:alanruttenberg@gmail.com] 
> Sent: Sunday, June 08, 2008 6:18 PM
> To: Kashyap, Vipul
> Cc: Christine Golbreich; OWL Working Group WG
> Subject: Re: Representation of Negative Assertions in OWL 1.0
> 
> 
> On Jun 8, 2008, at 3:35 PM, Kashyap, Vipul wrote:
> 
> >
> >
> >>> Individual(Sarkozy type(Restriction(isPresidentOf allValuesFrom
> >>> (complementOf(oneOf(USA))))))
> >>
> >> what about:
> >>
> >> Individual(Sarkozy
> >> type(ObjectComplementOf(ObjectAllValuesFrom(isPresidentOf
> >> ObjectOneOf(USA))))) ???
> 
> It may be intuitive, but I don't believe it captures what you want.  
> It says that Sarkozy can't only be the the president of the USA.  
> However he could be president of both the USA and France.
> 
> I've put these examples in an OWL file. If you classify it you will  
> see that the previous two expressions (from earlier emails) are  
> determined to be equivalent, and that there is no inconsistency in  
> making Sarkozy a president of both USA and France, as I have done in  
> the example.
> 
> http://purl.org/science/owl2/examples/president.owl
> 
> Best,
> Alan
> 
> >
> > IMHO, the above representation is more intuitive than the  
> > representations
> > proposed by Alan and I and corresponds, in my mind, to the "closest"
> > representation to the negative assertion 'Sarkozy is not the  
> > President of the
> > USA"
> >
> > Of course all these are logically equivalent representations, but  
> > they have
> > different connotations to the non-logically oriented subject matter
> > expert/ontology engineer.
> >
> > This is precisely, why the syntactic sugar is a very good value add.
> >
> > ---Vipul
> >
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> 
Received on Sunday, 8 June 2008 22:39:07 GMT

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