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Re: n-triples for datatype values [was: Agenda for RDFCore WG Telecon 2002-10-18]

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Fri, 1 Nov 2002 10:10:02 +0200
Message-ID: <006e01c2817e$14815d80$2380720a@NOE.Nokia.com>
To: "Tim Berners-Lee <timbl" <timbl@w3.org>, "Jos De_Roo" <jos.deroo.jd@belgium.agfa.com>, "ext pat hayes" <phayes@ai.uwf.edu>
Cc: <w3c-rdfcore-wg@w3.org>



[Patrick Stickler, Nokia/Finland, (+358 40) 801 9690, patrick.stickler@nokia.com]


----- Original Message ----- 
From: "ext pat hayes" <phayes@ai.uwf.edu>
To: "Tim Berners-Lee <timbl" <timbl@w3.org>; "Jos De_Roo" <jos.deroo.jd@belgium.agfa.com>
Cc: <w3c-rdfcore-wg@w3.org>
Sent: 01 November, 2002 06:29
Subject: Re: n-triples for datatype values [was: Agenda for RDFCore WG Telecon 2002-10-18]


> 
> >
> >
> >>  I feel that "^^", being syntactic, should only be usable with a
> >>  fixed set of type URIs.
> >
> >that's indeed better
> 
> Well, the current position is that there isnt a *syntactic* condition 
> to this effect (how could there be, when theres no syntactic 
> condition on type URIs?) but that if you use a URI that the RDF 
> engine can't resolve into a datatype, then it can't draw any 
> datatype-type conclusions involving the literal. In effect, a typed 
> literal with an unknown type URI is just an opaque string as far as 
> the RDF is concerned: it knows it means something, but it has no way 
> to find out what that is. It can infer an existential, is about all.
> 
> An engine could always throw an exception if it failed to recognize 
> an embedded dtype in a literal. Does it matter if the exception is 
> called syntactic or datatypish? .

Agreed. There should be no syntactic constraint on the URIs that can
be used to denote datatypes. Having a fixed set is non-extensible.

Patrick
Received on Friday, 1 November 2002 03:10:14 EST

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