RE: SUO: Monolithic ontologies (was ontology as science)
Dear Adam,
How do you distinguish between classes and properties?
Matthew West
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> -----Original Message-----
> From: Adam Pease [mailto:adampease@earthlink.net]
> Sent: 02 July 2003 02:22
> To: Patrick Cassidy
> Cc: standard-upper-ontology@ieee.org
> Subject: Re: SUO: Monolithic ontologies (was ontology as science)
>
>
>
> Pat,
>
> At 05:27 PM 7/1/2003 -0400, Patrick Cassidy wrote:
>
> >Adam,
> > Concerning your statement:
> >
> > > That entities do not change their class membership over time,
> > > and that classes themselves are reserved for those things which do
> > > not change, is an important guideline.
> > >
> >
> > First, a clarification: Do you consider SUMO 3D or 4D or both?
>
> I think Ian commented earlier that he considers SUMO
> basically 3D. That
> sounds right to me, although you're welcome to ask him for
> elaboration.
>
> > The specific question related to your statement above is
> >whether roles (student, dentist) must therefore be treated
> >only as relations, or whether they can also be classes.
> >The latter would seem to require that membership change
> >over time.
>
> Those sorts of roles have been treated as properties. Take a look at
> SocialRole
> <http://ontology.teknowledge.com:8080/rsigma/SKB.jsp?req=SC&na
me=SocialRole&skb=SUMO>
> If roles cannot be classes, then do you consider SUMO
>classes like "Food" and "BiologicallyActiveSubstance"
>as *not* being roles which might change for a particular object?
I'm guessing that you're concerned about cases like the same substance
being used as a floor wax or a dessert topping, but as I see it, it would
still be a food, just as a table could be used as a chair, or a TV as a
hammer, but they would still be tables and TVs, respectively.
Adam
> Pat
>
>=============================================
>Patrick Cassidy
>
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>
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>=============================================