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Re: Latest iteration of RDF Datatyping WD (ship it!)

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Mon, 15 Apr 2002 20:21:39 -0400
Message-Id: <p05101523b8e11e54acb2@[65.217.30.94]>
To: "Jos De_Roo" <jos.deroo.jd@belgium.agfa.com>
Cc: w3c-rdfcore-wg@w3.org
>  > > For those who are interested, the latest incarnation of the
>>  > RDF Datatyping WD can be found at
>>  >
>>  >    http://www-nrc.nokia.com/sw/rdf-datatyping.html
>>  $Date: 2002/04/11 12:35:11 $
>>
>>  Hmm... on the one hand, I have been looking at each
>>  draft saying "well, it doesn't have the use case
>>  examples, and that's all I care about; I'll read
>>  the next one."
>>
>>  But then I peeked into this one... and I mostly
>>  like what I see.
>
>well, I have concerns about the *either* ... *or* in
>
>[[[
>    The rdfd:range property imposes a datatyping constraint
>    on its subject such that all values of the constrained
>    property must correspond *either* to a literal node
>    which is a member of the lexical space of the specified
>    datatype (a lexical form), *or* to a non-literal node
>    denoting a member of the value space of the specified
>    datatype (a datatype value) to which is attached by
>    means of either the rdf:lex property or a datatype
>    property a literal node which is a member of the lexical
>    space of the specified datatype.
>]]]
>    -- http://www-nrc.nokia.com/sw/rdf-datatyping.html
>
>this sounds like a union...
>and I don't see that as explained in
>http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2002Mar/0151.html
>and as I still think we should have
>   rdfd:range rdfs:subPropertyOf rdfs:range .

I would not recommend that. That would re-introduce all the 
range-inheritance problems assocaited with datatyping. The basic idea 
of the current proposal is to keep range-assignment (ie rdfs:Range) 
and datatyping (rdfd:Range) quite separate, so you can have either 
one without the other (or both if you choose to). That is the only 
way I can see to allow the kind of Dublin-Core sloppiness in a 
rational framework.

Pat


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Received on Monday, 15 April 2002 20:21:43 EDT

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