- From: Graham Klyne <gk@ninebynine.org>
- Date: Sun, 11 Jul 2004 11:39:50 +0100
- To: Damian Steer <damian.steer@hp.com>
- Cc: www-rdf-interest@w3.org
At 10:10 11/07/04 +0100, Damian Steer wrote:
>On 9 Jul 2004, at 14:09, Graham Klyne wrote:
>
>>
>>Hmmm. Let's try a test case.
>>
>>Does this:
>>
>> <dc:title> The trouble with spaces </dc:title>
>
>...
>
>>
>>RDF-entail this:
>>
>> <dc:title
>> rdf:datatype="http://www.w3.org/2001/XMLSchema#string"> The trouble
>> with spaces </dc:title>
>
>...
>
>>I think it should, but under your suggested regime I think it would not.
>
>I think the specs support Norm's regime here. Try this:
>
><dc:title xml:lang="en"> The trouble with spaces </dc:title>
>
>A reasonable extension of your inference would give:
>
><dc:title xml:lang="en"
>rdf:datatype="http://www.w3.org/2001/XMLSchema#string"> The trouble with
>spaces </dc:title>
(Ignoring the language tags) I would not accept that as an expected
entailment. They are different string values.
>But (strangely, I confess) the latter is invalid rdf: only plain literals
>can have langs.
>
>So you either maintain the orthogonality of plain- and datatyped-literals,
>or you get a weird restriction on rdf entailments ("...except for
>lang-tagged literals").
I would also say that the entailment does not hold for the same string with
different language tags, or with- and without- a language tag.
#g
------------
Graham Klyne
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Received on Sunday, 11 July 2004 06:39:55 UTC