- From: Jeremy Carroll <jjc@hplb.hpl.hp.com>
- Date: Tue, 23 Apr 2002 14:59:33 +0100
- To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
- Cc: <connolly@w3.org>, <jonathan@openhealth.org>, <www-webont-wg@w3.org>
Oh yes, that looks right (i.e. like what I thought you were trying to say). I find KB4 entailing KB2 quite difficult on the circularity basis. If we name the class _:1 as <Circular> then we are back to saying things like John rdf:type Circular . iff John rdf:type Circular . which is reminiscient of sets like the set of all sets that *do* belong to themselves. Does it belong to itself or not? Jeremy > -----Original Message----- > From: www-webont-wg-request@w3.org > [mailto:www-webont-wg-request@w3.org]On Behalf Of Peter F. > Patel-Schneider > Sent: 23 April 2002 14:01 > To: jjc@hplb.hpl.hp.com > Cc: connolly@w3.org; jonathan@openhealth.org; www-webont-wg@w3.org > Subject: RE: SEM: circular primitive > > > On further reflection here is my understanding of this case > > KB1: > John rdf:type Person . > Bill rdf:type Person . > John child Bill . > > KB2: > John rdf:type _:1 . > _:1 rdf:type daml:Restriction . > _:1 rdf:onProperty child . > _:1 rdf:hasClass :_1 . > > KB3: > Bill rdf:type _:1 . > > KB4: > John child John . > > I do not believe (contrary to my previous assertion), that KB1 should > entail KB2, precisely for the reasons mentioned by Jeremy. > > However, KB4 should entail KB2. > > Sorry for any confusion my confusion caused. > > > Here is a further examples that may prove illustrative > > KB5: > John rdf:type _:2 . > _:2 daml:onProperty child . > _:2 daml:cardinality "0" . > > KB6: > John rdf:type _:3 . > _:3 daml:onProperty child . > _:3 daml:toClass _:3 . > > I believe that KB5 should entail KB6. > > peter > >
Received on Tuesday, 23 April 2002 09:59:52 UTC