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Re: Help needed. Isn't this OWL document inconsistent?

From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
Date: Sun, 25 Sep 2005 11:22:24 -0400 (EDT)
Message-Id: <20050925.112224.42795391.pfps@research.bell-labs.com>
To: mekanikzain@gmail.com
Cc: www-rdf-logic@w3.org

One modelling problem in your example is that vegetarians are only required to
eat at least one thing that is a plant.  You probably want that everything that
vegetarians eat is derived from plants, although there is a different problem
here for you to spot.

The mad cow example has received a lot of attention.  You might want to look at
http://www.mindswap.org/2005/debugging/ for more information.  There is as well
a mad cow ontology from Manchester.

Peter F. Patel-Schneider
Bell Labs Research


From: Mekan Ikzain <mekanikzain@gmail.com>
Subject: Help needed. Isn't this OWL document inconsistent?
Date: Sun, 25 Sep 2005 23:17:25 +0900

> Hi all,
> 
> I think the following OWL document is inconsistent,
> but Pellet says that it's consistent.
> Please shed some light on my ignorant brain.
> 
> @prefix rdfs:    < http://www.w3.org/2000/01/rdf-schema#
> <http://www.w3.org/2000/01/rdf-schema#> >.
> @prefix rdf:     < http://www.w3.org/1999/02/22-rdf-syntax-ns#
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#> >.
> @prefix owl:     < http://www.w3.org/2002/07/owl#
> <http://www.w3.org/2002/07/owl#> >.
> @prefix a: < http://www.ex.org/2005/ex# <http://www.ex.org/2005/ex#> >.
> 
> a:Vegetarian 
>       owl:intersectionOf
>          (a:Animal 
>           [a owl:Restriction; 
>            owl:onProperty a:eats;
>            owl:someValuesFrom a:Plant
>           ]
>          ).
> a:Plant owl:complementOf a:Animal.
> a:Sheep rdfs:subClassOf a:Vegetarian.
> a:Cow rdfs:subClassOf a:Vegetarian.
> a:MadCow
>       owl:intersectionOf 
>          (a:Cow
>           [a owl:Restriction; 
>            owl:onProperty a:eats;
>            owl:someValuesFrom a:Sheep
>           ]
>          ).
> 
> Thanks in advance!
> Mekan Ikzain
> 
Received on Sunday, 25 September 2005 15:22:48 GMT

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