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Re: reviewing RDF Schema [was: RDFS snapshot]

From: Jos De_Roo <jos.deroo.jd@belgium.agfa.com>
Date: Wed, 13 Nov 2002 00:51:55 +0100
To: "Dan Brickley <danbri" <danbri@w3.org>
Cc: brian_mcbride@hp.com, em@w3.org, w3c-rdfcore-wg@w3.org, w3c-rdfcore-wg-request@w3.org
Message-ID: <OF2CE4CF70.994B80B0-ONC1256C6F.008299D3-C1256C6F.008324F7@agfa.be>


Dan, Brian,

http://www.w3.org/2001/sw/RDFCore/Schema/200211/
is from my side a thumbs up for WD publication

-- ,
Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/


                                                                                                                        
                    Dan Brickley                                                                                        
                    <danbri@w3.org>           To:     Jos De_Roo <jos.deroo.jd@belgium.agfa.com>                        
                    Sent by:                  cc:     <brian_mcbride@hp.com>, <em@w3.org>, <w3c-rdfcore-wg@w3.org>      
                    w3c-rdfcore-wg-requ       Subject:     Re: reviewing RDF Schema [was: RDFS snapshot]                
                    est@w3.org                                                                                          
                                                                                                                        
                                                                                                                        
                    2002-11-12 04:33 PM                                                                                 
                                                                                                                        
                                                                                                                        







On Tue, 12 Nov 2002, Jos De_Roo wrote:

>
> > RDF Schema overview
> > @@NOTE: EDITORIAL TODO -- regenerate this table from
> > the RDF/XML schema doc.@@
>
> such a table is quite useful but must reflect state of affairs

Ack'd.

> I think the following is critical
> (but easy to correct by removal)
>
> > rdfs:subPropertyOf
> > ...
> > Sub-property hierarchies can be used to express hierarchies
> > of range and domain constraints. All rdfs:range and rdfs:domain
> > properties that apply to an RDF property also apply to each
> > of its sub-properties.
>
> NO, please see MT

OK, I have removed that second sentence.

In doing this and recent edits, I note that there are many places
throughout the document where we need a detailed crossreference to the MT
(or other) specs. Can't do that now, but the need is acknowledged.

Dan

>
> [[
> The semantics given here for rdfs:range and rdfs:domain do
> not entail that superclasses of domains or ranges of a
> property must also be domains and ranges of that property.
> Semantic extensions MAY strengthen the domain and range
> semantic conditions to the following:
>
> <x,y> is in IEXT(I(rdfs:range)) if and only if
>   (if <u,v> is in IEXT(x) then v is in ICEXT(y))
>
> <x,y> is in IEXT(I(rdfs:domain)) if and only if
>   (if <u,v> is in IEXT(x) then u is in ICEXT(y))
>
> This stronger condition will not effect any class-membership
> entailments on the elements of the domains and ranges of the
> property. The semantics given here was chosen because it is
> sufficient for all normal uses of these terms and allows
> some subtleties in class reasoning.
> ]]
>
> > Note: range, domain and sub-property hierarchies
> > Sub-property hierarchies can be used to express hierarchies
> > of range and domain constraints. All rdfs:range and
> > rdfs:domain properties that apply to an RDF property also
> > apply to each of its sub-properties.
>
> same as above
>
> > rdfs:member
> > The rdfs:member property is a super-property of the container
> > membership properties, and a member of the class
> > rdfs:ContainerMembershipProperty.
>
> rdfs:member it's not a member of rdfs:ContainerMembershipProperty.
>
> -- ,
> Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
>
>
>
>                     Dan Brickley
>                     <danbri@w3.org>           To:
<brian_mcbride@hp.com>, <em@w3.org>
>                     Sent by:                  cc:
<w3c-rdfcore-wg@w3.org>
>                     w3c-rdfcore-wg-requ       Subject:     RDFS snapshot
>                     est@w3.org
>
>
>                     2002-11-12 03:40 AM
>
>
>
>
>
>
>
>
> http://www.w3.org/2001/sw/RDFCore/Schema/200211/
>
> I've updated the embedded and linked XML/RDF, fixed a bunch of other
> glitches. Haven't yet regenerated the table. XMLLiteral is now included
in
> RDFS namespace. The new references section is in, but the rest of the
spec
> doesn't have any text that uses those references yet; maybe someone has a
> paragraph we could paste early into the document to accomplish this?
>
> Dan
>
>
>
>
>
Received on Tuesday, 12 November 2002 18:52:41 EST

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