Hi
I'm only starting to stroll in the foothills of mount semantic web but I have
been attempting to use skos subjects in the mashups I've been experimenting
with so I'm risking a probably naive intrusion into this debate .
One of my mashups is a map of football stadiums in England:
http://maps.google.co.uk/maps?q=http://www.cems.uwe.ac.uk/xmlwiki/RDF/stadium2kml.xq
in which I make use of the skos:subject dbpedia:Football_venues_in_England in
the underlying SPARQL query
but if I take a typical resource (Abbey Stadium in Cambridge) in this category
I find these skos:subjects:
* dbpedia:Category:Buildings_and_structures_in_Cambridgeshire
* dbpedia:Category:Cambridge
* dbpedia:Category:Cambridge_United_F.C.
* dbpedia:Category:Football_venues_in_England
These are all logically redundant
* dbpedia:Category:Cambridge - is the same as p:location
* dbpedia:Category:Cambridge_United_F.C. is inverse of
dbpedia:Cambridge_United_F.C. p:ground ?r
* dbpedia:Category:Football_venues_in_England should be deducible given
Cambridge_United is a football club (although this is not obviously so in the
dbpedia data)
* dbpedia:Category:Buildings_and_structures_in_Cambridgeshire is a
conjunction of rdfs:type yago:Building102913152
and some geo data set which knows that Cambridge is in Cambridgeshire)
This leads me to think that wikipedia categories are (nearly?) always redundant
derived relationships which, since manually created or roboted) are likely to
be also imperfect. Since there is no end to the derived relationships which
could be materialised into such categories, perhaps it's a waste of time
wondering what they really are or perhaps they should be labeled as
derivedRelationship and linked to the rule which is their basis.
Chris Wallace
UWE Bristol
This email was independently scanned for viruses by McAfee anti-virus software
and none were found
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Dbpedia-discussion mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
