[SKOS] ISSUE-181 (was Re: LC Comments: Classification Schemes)

Hi Antoine,

On Mon, Oct 13, 2008 at 06:04:19PM +0200, Antoine Isaac wrote:
>> * ISSUE-181
> This is again related to the issue of skos:Collections that cannot be  
> included in concept hierarchies.
> If Michael's "centered entities" really cannot be modelled as  
> Collections, then indeed the only choice would be to represent them as  
> skos:Concepts.
> Note that if we had accepted the requirement  
> R-IndexingAndNonIndexingConcepts [3] we could have proposed a solution  
> to this. Indeed I guess that Michael's "non-assignable" concepts can be  
> likened to what I called "non-indexing concepts" (if we ignore the fact  
> that Michael's entities also have a skos:Collection flavour).
> Still, as the requirement of having an indexing property in SKOS has  
> been dropped, we have (rightfully) dropped this one as well.
> Therefore, given the current state of SKOS, what I would recommand is  
> for Michael to make his own solution to  
> R-IndexingAndNonIndexingConcepts. That is:
> - first identify an indexing property he wants to use to assign concepts  
> to other resources (e.g. dc:subject).
> - second, define a subclass of skos:Concept, e.g.  
> my:NonAssignableConcept, which is defined as not being usable as the  
> object of statements involving the chosen indexing property. This can be  
> done in OWL  using a property inverse of the indexing one, in an  
> appropriate OWL cardinality constraint.

Sounds very reasonable, thanks.


>> [1] http://lists.w3.org/Archives/Public/public-swd-wg/2008Oct/0061.html
> [2] http://lists.w3.org/Archives/Public/public-swd-wg/2008Oct/0131.html
> [3] http://www.w3.org/TR/SKOS-UCR#R-IndexingAndNonIndexingConcepts
> [4] http://lists.w3.org/Archives/Public/public-swd-wg/2008Oct/0132.html

Alistair Miles
Senior Computing Officer
Image Bioinformatics Research Group
Department of Zoology
The Tinbergen Building
University of Oxford
South Parks Road
United Kingdom
Web: http://purl.org/net/aliman
Email: alistair.miles@zoo.ox.ac.uk
Tel: +44 (0)1865 281993

Received on Tuesday, 14 October 2008 11:36:56 UTC