On Tue, Sep 1, 2009 at 6:50 PM, Bernard
Vatant<[log in to unmask]> wrote:
> Hello all
>
> I've had last week private exchanges with Tom Baker about the definition of
> the range of a certain number of dcterms properties, which are currently let
> open in the specification document at
> http://dublincore.org/documents/dcmi-terms/. Among those are
> dcterms:language and dcterms:subject. I will let the former for a further
> message, and focus here on the latter.
>
> Now that the SKOS specification has been cast in stone by W3C, it seems that
> instances of skos:Concept should be natural candidates for being values of
> dcterms:subject, but it is too restrictive to have in the specification
> something like the following
>
> dcterms:subject rdfs:range skos:Concept
If there are no reasonable values for dcterms:subject which aren't
also in the class SKOS called "Concept", then this is OK.
http://dublincore.org/documents/dcmi-terms/#terms-subject
"The topic of the resource."
"Typically, the subject will be represented using keywords, key
phrases, or classification codes. Recommended best practice is to use
a controlled vocabulary."
" This term is intended to be used with non-literal values as defined
in the DCMI Abstract Model
(http://dublincore.org/documents/abstract-model/). As of December
2007, the DCMI Usage Board is seeking a way to express this intention
with a formal range declaration."
This definition seems to allow in, just about, the use of a URI for a
thing directly. Eg. if Paris the city is a topic of some document, we
could perhaps write dcterms:subject and then a URI for the city.
If the DC usage board doesn't feel this habit quite fits with the
intent, then I suggest it's definition pretty much is the same as
SKOS's notion of Concept, and there would be no harm to assert a range
of skos:Concept.
Note that asserting such a range doesn't force you to actually use
SKOS alongside DC, or for the concept mentioned to have a
derferenceable URI, or for there to be SKOS at the end of the link,
etc.
Are there any candidate examples of things that reasonably aren't skos
Concepts, yet are good values for dcterms:subject?
cheers,
Dan
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