Hi Tim
I understand what you are saying -- but some of this reflects the
way types are associated with freebase instances. The types are more
like 'tags' in the sense that there is no hierarchy, but each
instance is annotated with multiple types. So an artist would in
fact be annotated with person reliably (and probably less
consistently with /music/artist). Similar issues with Uyhurs,
murdered children etc. The issue is differences in modeling
granularity as well. Perhaps a better thing to look at are types
where the YAGO types map to Wordnet (this is usually at a coarser
level of granularity).
Kavitha
On Aug 10, 2009, at 3:24 PM, Tim Finin wrote:
Kingsley Idehen wrote:
Your dbpedia --> freebase type link mappings are now live re. the
public
DBpedia instance. Very very cool stuff!
Graph IRI: <http://dbpedia.org/freebase_type_links#>
...
I thought that this would be super useful, but when I looked at the
example in the message
http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fclass%
2Fyago%2FNewYorkCityMusicians&urilookup=1
I noticed that the yago:Musician is declared to be owl:equivalentClass
freebase:people/person. This can't be right. Greping through the NT
dump I find more than 20K yago classes defined to be the equivalent of
Freebase's people/person, including Uyghurs, murdered children and
Norwegian Eurovision contestants. Given the semantics of
owl:equivalentClass, all 20K of these yago classes are asserted to
have the same extent.
Now *that's* irrational exuberance!
--
Tim Finin, Computer Science & Electrical Engineering, Univ of
Maryland
Baltimore County, 1000 Hilltop Cir, Baltimore MD 21250.
[email protected]
http://umbc.edu/~finin 410-455-3522 fax:-3969 http://
ebiquity.umbc.edu
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