W3C home > Mailing lists > Public > www-rdf-interest@w3.org > June 2001

RE: rdfms-resource-semantics

From: Lee Jonas <lee.jonas@cakehouse.co.uk>
Date: Thu, 7 Jun 2001 12:51:20 +0100
Message-ID: <51ED29F31E20D411AAFD00105A4CD7A77138@ZINGIBER>
To: "'Sampo Syreeni'" <decoy@iki.fi>, Lee Jonas <lee.jonas@cakehouse.co.uk>
Cc: www-rdf-interest@w3.org
Sampo Syreeni [mailto:decoy@iki.fi] wrote:
>
>On Wed, 6 Jun 2001, Lee Jonas wrote:
>
>>I didn't fully understand what you meant by this para.  My point is: the
>>RDF spec should say RDF describes things via URI references as outlined in
>>RFC2396, full stop.  I.e. stop trying to define a special notion of
>>'resource'/'thing'/'entity' in the RDF spec - it *is* whatever can be
>>referred to by a URI reference.  The RFC2396 definitions of Resource,
>>Entity, URI, URI reference, etc are all normative and sufficient.
>
>It was already pointed out that the fragment identifier is not part of the
>URI, i.e. the identity of the *resource* pointed to by a URI reference.
>RFC2396 uses the work 'resource' to mean whatever is being pointed to by a
>URI, not a URI *reference*. The thing pointed to by a URI reference isn't
>given a name, and people too often use the word 'resource' to refer to it,
>even when this isn't the case. In this sense, the resource in the M&S sense
>is very different from the RFC2396 one, and the distinction should be
>emphasized.

I never said the fragment identifier was used in the identification of a
'resource' (RFC2396 sense).

All this confusion over 'resource' (RFC2396 sense) and 'resource' (RDF
sense) is precisely why I advocate eliminating the inconsistent definition
of 'resource' altogether from the RDF M&S spec.  Not, as you suggest, making
a special distinction.  Modularization is a fundamental computing principle.
Yet specific definitions of what URIs and URI references actually point to
in the RDF spec *reduces* modularization.  What happens if RFC2396 gets
obsoleted by a new and improved version? Any special definitions in the RDF
spec may become inconsistent and/or incompatible as a result.

Hence I suggest that the RDF spec should be changed to say that triples
describe whatever can be referenced by a URI reference - i.e. a 'view' or a
'part' of the resource identified by the URI.  At the end of the day, RDF
semantics would remain unchanged: triples (p, s, o) where 'p' & 's', and
optionally 'o', are URI references.

regards

Lee

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end
Received on Thursday, 7 June 2001 07:51:36 GMT

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