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Re: RDF vocabulary definitions

From: Richard H. McCullough <rhm@cdepot.net>
Date: Wed, 20 Nov 2002 14:32:40 -0800
Message-ID: <000b01c290e4$bd09e240$bd7ba8c0@rhm8200>
To: <www-rdf-interest@w3.org>, "David Menendez" <zednenem@psualum.com>
Re: RDF vocabulary definitionsI guess I don't understand the real meaning of RDF-MT.
Can you give me a definition of "instance", "individual", and "subclass" in English?
============ 
Dick McCullough 
knowledge := man do identify od existent done
knowledge haspart list of proposition

  ----- Original Message ----- 
  From: David Menendez 
  To: Richard H. McCullough ; www-rdf-interest@w3.org 
  Sent: Wednesday, November 20, 2002 2:16 PM
  Subject: Re: RDF vocabulary definitions


  At 1:31 PM -0800 2002-11-20, Richard H. McCullough wrote:
    David
    I appreciate your effort.  I'm afraid I was erroneously venting my frustration on you.  I apologize for that.


  Apology accepted.


    I have been frustrated in my attempts to pin down the meaning of "Class".  There are so many documents that I have trouble finding one which addresses my concerns, and almost as much trouble re-finding it later.


  Something for the working group to consider, I imagine. One problem is that the  "official" documents are out of date and/or inaccurate.


    Just referring to your summary, perhaps you didn't recognize one of its consequents:

        hasSex  type  Property    implies    Property  subClassOf  Class


  I believe you mean:


    eg:hasSex rdf:type rdf:Property.
  implies
    rdf:Property rdf:type rdfs:Class.


  I wrote that rdf:Property and rdfs:Class are instances of rdfs:Class.
    I(rdf:Property) is in ICEXT(I(rdfs:Class))
    I(rdfs:Class) is in ICEXT(I(rdfs:Class))


  This is not the same as saying they are subclasses of rdfs:Class.
    ICEXT(I(rdf:Property)) subset of ICEXT(I(rdfs:Class))  # probably not true
    ICEXT(I(rdfs:Class)) subset of ICEXT(I(rdfs:Class))


  As it happens rdfs:Class is a subclass of rdfs:Class, but nothing in RDFS suggests that rdf:Property is a subclass of rdfs:Class.


  If you're seeing something in what I wrote that implies that rdf:Property is a subclass of rdfs:Class, please point it out to me.


-- 
Dave Menendez - zednenem@psualum.com - http://www.eyrie.org/~zednenem/
Received on Wednesday, 20 November 2002 17:32:43 GMT

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