- From: Richard H. McCullough <rhm@cdepot.net>
- Date: Tue, 19 Nov 2002 23:07:18 -0800
- To: "Sandro Hawke" <sandro@w3.org>, "David Menendez" <zednenem@psualum.com>
- Cc: <www-rdf-interest@w3.org>
- Message-ID: <000a01c29063$7751d950$bd7ba8c0@rhm8200>
This sounds to me like the same confusion between two different definitions of "Class". I offer these two definitions: Class1 is the Datatype used to represent a concept. Class2 is concept. ============ Dick McCullough knowledge := man do identify od existent done knowledge haspart list of proposition ----- Original Message ----- From: David Menendez To: Sandro Hawke Cc: www-rdf-interest@w3.org Sent: Tuesday, November 19, 2002 10:31 PM Subject: Re: RDF vocabulary definitions At 10:48 PM -0500 2002-11-19, Sandro Hawke wrote: >These are true though, I think: > > x rdf:type rdfs:Property. > iff > x rdfs:subPropertyOf rdfs:Property. > >and > > x rdf:type rdfs:Class. > iff > x rdfs:subClassOf rdfs:Resource. > >and that little asymmetry was confusing me. The second implication is true (it's rdfs7a), but I don't believe the first one is. As far as I'm aware, rdf:Property is a class, not a property, so it wouldn't have sub-properties. Otherwise, eg:my_car eg:color "Green". Implies eg:color rdf:type rdf:Property. # rdf1 eg:color rdfs:subPropertyOf rdf:Property. # what you just said eg:my_car rdf:Property "Green". # rdfs6 rdf:Property rdf:type rdf:Property. # rdf1 According to the schema: rdf:Property rdf:type rdfs:Class. RDF doesn't forbid terms from being both property and class, but I'm not aware of anything suggesting that rdf:Property is one of them. Is it possible you're thinking of rdfs5b? X rdf:type rdf:Property. Implies X rdfs:subPropertyOf X. -- Dave Menendez - zednenem@psualum.com - http://www.eyrie.org/~zednenem/
Received on Wednesday, 20 November 2002 02:07:22 UTC