- From: Richard H. McCullough <rhm@cdepot.net>
- Date: Thu, 14 Nov 2002 03:10:56 -0800
- To: "Dan Brinkley" <danbri@w3.org>, "R. V. Guha" <rguha@us.ibm.com>
- Cc: "RDF-Interest" <www-rdf-interest@w3.org>
Received on Thursday, 14 November 2002 06:11:01 UTC
Reference: http://www.w3.org/TR/2002/WD-rdf-schema-20021112/ My main focus was on the tables summarizing Class and Property vocabulary. 1. Class is confusing, because it is used in two different senses, with no discussion of the distinctions. a. Class as concept - "programming" hierarchy - analogous to a universal data structure b. Class as entity - "meaning" hierarchy - where Resources (existents) are either Classes (entities) or Properties (attributes) 2.ContainerMembershipProperty is a Property, not a Class. 3. range "not specified" should be "Resource", since it subsumes everything. BTW, I find the following format useful for specifying domain and range: domain has Property = range which is the generalization of the statement subject has predicate = object 4. Is a Bag a multiset (repeated elements) or a set? 5. I understand that List is a subclass of Seq, but I don't know why it's necessary to have two different classes. 6. I wonder why subClassOf and subPropertyOf include the cases of the same Class and same Property? In my work, I use the other definition, where the same Class/Property is excluded. I think it is important to separate identity and genus-species relations. BTW, since Class and Property are both concepts, there is no reason to have two separate properties. ============ Dick McCullough knowledge := man do identify od existent done knowledge haspart list of proposition
Received on Thursday, 14 November 2002 06:11:01 UTC