Re: SUO: Monolithic ontologies (was ontology as science)

[Patrick Cassidy <pcassidy@bellatlantic.net>]

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?

    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.
    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?

     Pat

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Patrick Cassidy

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