- From: Williams, Stuart \(HP Labs, Bristol\) <skw@hp.com>
- Date: Mon, 13 Nov 2006 09:24:05 -0000
- To: "Bernard Vatant" <bernard.vatant@mondeca.com>
- Cc: "Lars Marius Garshol" <larsga@garshol.priv.no>, <public-esw-thes@w3.org>
Hello Bernard,
> Hello Stuart
> > Hello Lars (and Bernard)
> >
> > FWIW I'm much happier now that I've spotted the blank node I'd
> > previously missed in the SKOS Guide example Published Subject
> > Indicators.
> >
> To be honest I had missed it also so far. Thanks for pointing at this
> > I would have seen it more quickly with N3 and/or a diagram
> >
> Sure. I opened it with SWOOP just to make sure :-)
:-)
> Anyway, I'm not sure this is exactly an answer to your
> original question.
Well, it doesn't directly, though more explainatory narrative might.
IMO it would be better if the domain of skos:subjectIndicator were wider
than skos:Concept - as you point out below a subject can be anything
(kind of thing). However, if one were to think of an blank skos:Concept
acting in the role of a (bnode) subject (tm sense of subject) as
distinct from a local conceptualisation of that subject, I think that,
with care, things can be written to work as intended (that seems a bit
vague - sorry).
Cleaner would be to open up the domain of subjectIndicator (and to leave
it as an IFP).
> You still need in this example the level
> of indirection we have been speaking about, since the
> skos:subjectIndicator is directly attached to the blank node,
> which is therefore a skos:Concept, not to the abstract blank
> subject represented by this concept.
Yes...
> The fact that the skos:Concept in this example is represented
> by a blank node does not change the issue. It's a
> skos:Concept altogether, and is the same as (owl:sameAs) the
> "Ornithology" concept of the previous example if
> skos:subjectIndicatorRef is an IFP.
Yes... but (FWIW) that concept node is also blank (and doesn't have a
nodeID for internal skos:subject references).
[Quoting the example to make sure that we're talking about the same one]
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:skos="http://www.w3.org/2004/02/skos/core#">
<skos:Concept>
<skos:prefLabel>ornithology</skos:prefLabel>
<skos:subjectIndicator
rdf:resource="http://www.example.com/psi/ornithology.html"/>
</skos:Concept>
</rdf:RDF>
>
> Bernard
>
Best regards
Stuart
--
Received on Monday, 13 November 2006 09:24:21 UTC