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Re: Using DBpedia resources as skos:Concepts?

From: Ross Singer <rossfsinger@gmail.com>
Date: Wed, 4 Nov 2009 08:50:00 -0400
Message-ID: <23b83f160911040450tdb1f749ve44c4c2fdf74183d@mail.gmail.com>
To: Richard Cyganiak <richard@cyganiak.de>
Cc: dbpedia-discussion@lists.sourceforge.net, SKOS <public-esw-thes@w3.org>, Pat Hayes <phayes@ihmc.us>
Is this the sort of scenario where umbel comes into play?  If so, I
might start understanding what exactly umbel is.

Given what I can parse from the documentation (hairnet over the
basketball and everything) is that:
  a skosConcept;
  umbel:linksEntity <http://dbpedia.org/resource/Michelle_Obama>;

might work.  The definition of linksEntity is this:

Property name:  umbel:linksEntity

Description:  Check the definition of umbel:isAbout for the definition
of this property; linksEntity is the inverse property of isAbout.

Domain:  umbel:SubjectConcept

Range: owl:Thing

Inverse-of: umbel:isAbout

with umbel:isAbout being:

Property name:  umbel:isAbout

Description:  The property umbel:isAbout is used to assert the
relation between a named entity (individual) and a subject concept
class. umbel:isAbout relates the named entity (individual) to the
class through the basis of its subject matter. The relation
acknowledges that the scope of the class can not be determined solely
by the aggregation or extent of its associated individual entity
members, and that the nature of the subject concept class may not
alone bound or define the individual entity.

Named entities may be related with multiple subject concept classes.
The domain of umbel:isAbout defines its class description as the class
of all individuals (owl:Thing) and its range as the class of subject
concepts (umbel:SubjectConcept), thereby bounding the property's
proper semantics of associating individuals to their related subject
concept class(es).

This property is therefore used to create a topical assertion between
an individual and a subject concept.

Domain: owl:Thing

Range: umbel:SubjectConcept

an umbel:SubjectConcept is a subclass of a skos:Concept.

If this -is- how that's supposed to work, it seems like a work around
the "aboutness" vs. "isness" issue.


On Tue, Nov 3, 2009 at 8:56 PM, Richard Cyganiak <richard@cyganiak.de> wrote:
> Hi,
> I want to get some broader feedback and opinion on this question.
> There is a use case where an external dataset is modelled in SKOS, and we
> want to map it to DBpedia. Something like:
> <http://mydataset/433256>
>  a skos:Concept;
>  owl:sameAs <http://dbpedia.org/resource/Michelle_Obama>;
>  .
> I've used owl:sameAs here. Now the problem is that my:433256 is a
> skos:Concept, while dbp:Michelle_Obama is a foaf:Person. I wonder wether
> that's a problem. I can't see any immediate contradiction arising from that,
> but I'm uncertain.
> Another option would be to use skos:closeMatch or skos:exactMatch, but these
> are intended for use between skos:Concepts, while I'm trying to connect a
> skos:Concept to a foaf:Person.
> The main question, I guess, is wether people in the DBpedia project would
> consider the assertion
>  <http://dbpedia.org/resource/Michelle_Obama> a skos:Concept .
> to be acceptable or erroneous, or wether SKOS folks tell me that
> skos:Concept is obviously disjoint from foaf:Person.
> I know that this is a complex issue, so I'm not really looking for a "right"
> or "wrong" answer. I'm more interested in getting all the pros and cons and
> pitfalls and caveats on the table, so please, if you have any opinion on the
> issue, I want to hear it.
> I'm cc'ing Pat Hayes, because he said he's interested in that kind of
> question.
> All the best and thanks for your time,
> Richard
> --
> Linked Data Technologist  Linked Data Research Centre
> Digital Enterprise Research Institute (DERI), NUI Galway, Ireland
> http://linkeddata.deri.ie/
> skype:richard.cyganiak
> tel:+353-91-49-5711
Received on Wednesday, 4 November 2009 12:50:33 UTC

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