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QCodes [was: RE: CURIEs: A proposal]

From: Misha Wolf <Misha.Wolf@reuters.com>
Date: Tue, 04 Jul 2006 14:30:21 +0100
To: www-tag@w3.org, public-rdf-in-xhtml-tf@w3.org, semantic-web@w3.org
Message-id: <A29ADE959C70A1449470AA9A212F5D80023DFD3C@LONSMSXM06.emea.ime.reuters.com>

On the basis of the survey of current and proposed uses of {prefix,
suffix} tuples [1] and the discussion with the TAG on June 27 [2],
I've concluded that CURIEs are not a good match for the IPTC's
requirements, as a CURIE is both named ("Compact URI") and designed 
(by the RDF-in-XHTML task force) to provide a compact representation
of an IRI, while the IPTC requires a compact representation of a 
{schemeAlias, code} tuple, which can be transformed to a schemeIRI 
(through the declaration of a schemeAlias/schemeIRI association) and
a codeIRI (through the use of a rule for constructing this IRI from a
schemeIRI and a code).  My current thinking is that we should define 
a QCode (Qualified Code), where:

   QCode       ::= SchemeAlias ':' Code
   SchemeAlias ::= NCNameChar+
   Code        ::= NCNameChar+

The schemeAlias/schemeIRI association is (in our case) declared using
the NewsML 2 <scheme> element:
   <scheme alias="foo" uri="http://..." />

We're still discussing which construction rule to recommend for the
building of a codeIRI from a schemeIRI and a code, as well as the 
closely related question of how to terminate schemeIRIs [1].

[1] http://lists.w3.org/Archives/Public/www-tag/2006Jun/0112.html
[2] http://www.w3.org/2001/tag/2006/06/27-minutes.html

Misha
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Received on Tuesday, 4 July 2006 13:30:42 GMT

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