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Re: incorrect ontology - QCR?

From: Nadja Lederer <nadja_lederer@gmx.at>
Date: Mon, 27 Dec 2010 13:04:31 +0100
Message-ID: <20101227120431.314400@gmx.net>
To: "Marco Colombetti" <colombet@elet.polimi.it>, public-owl-dev@w3.org
Hi Marco,

I see, thank you for your reply and the useful information!
Since Hermit cannot handle large cardinalities, we tried now - as suggested - Pellet and even FaCt++, unfortunately Pellet did return no more information than a "NullPointerException".
Have you ever encountered a
"ReasonerInternalException: FaCT++ Kernel: unsupported operation 'getDataSubType'" ? 

thanks a lot in advance,
cheers,
nadja


-------- Original-Nachricht --------
> Datum: Mon, 20 Dec 2010 23:10:20 +0100
> Von: "Marco Colombetti" <colombet@elet.polimi.it>
> An: "Nadja Lederer" <nadja_lederer@gmx.at>, public-owl-dev@w3.org
> Betreff: Re: incorrect ontology - QCR?

> There is a problem with Hermit, as Birte kindly explained 
> to me some time ago. It cannot handle "large" 
> cardinalities (which means above 3 or 4) because of the 
> way they are represented internally. No problem with other 
> reasoners, like Pellet.
> 
> Marco
> 
> On Mon, 20 Dec 2010 14:46:33 +0100
>   "Nadja Lederer" <nadja_lederer@gmx.at> wrote:
> > Hello all,
> > 
> > I'm stuck with a problem concerning Qualified 
> >Cardinality Restrictions in OWL ontology modelling and I 
> >really hope you could give some hints ;-)
> > 
> > I established an object property and made a class 
> >restriction like
> > "Game hasPositions exactly 22 Position".
> > Unfortunately the ontology doesn't seem to be able to 
> >handle a restriction like that. The result is, that in 
> >the course of classifying the reasoner (HermiT-Reasoner) 
> >within protege never comes out of the initialization 
> >process. It only starts to reason our ontology by using
> > "Game hasPositions some Position", which is not what we 
> >wanted to model.
> > 
> > Do you have any suggestions how to overcome a problem 
> >like this? Is this a problem with the ontology?
> > 
> > thank you very much,
> > cheers,
> > 
> > nadja
> > 
> > -- 
> > GMX DSL Doppel-Flat ab 19,99 Euro/mtl.! Jetzt auch mit 
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> > 
> > 
> 

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Received on Monday, 27 December 2010 12:05:07 GMT

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