Re: Moving forward

> The range of rdf:type is rdfs:Class, so either
>    :John a ( owl:intersectionOf ( :Person :Student ) ) .
> is a contradiction (if lists and classes are disjoint), or
>    ( owl:intersectionOf ( :Person :Student ) ) a rdfs:Class .
> which just gets us back to the first entailment.
> So I don't think that your distinction is defensible.
> Either you believe that these extra classes should exist or you believe
> that they shouldn't.  About the only viable intermediate point would be
> have another category that would include restrictions and boolean class
> combinations and have these exist but not have other kinds of classes
> exist.

I see and guess that that is what was meant with owl:Class and owl:List

  owl:Class a rdfs:Class .
  owl:Class rdfs:subClassOf rdfs:Class .   #@ so we have MT rdfs9

  owl:List a rdfs:Class .
  owl:List rdfs:subClassOf owl:Class .     #@@ so contradiction is ruled

  owl:intersectionOf a rdf:Property .
  owl:intersectionOf rdfs:domain owl:List .#@@@ that is a bit more restricted
  owl:intersectionOf rdfs:range owl:List .

I think the distinction is meaningful
if we have derived
  aaa a ( intersectionOf (bbb) )

we have only derived that *one* triple
and *not* the two triples
  aaa a _:x .
  _:x intersectionOf (bbb) .

and that is quite different from a truth preservation perspective, no?


Received on Tuesday, 19 March 2002 11:09:05 UTC