Hi Rocco,
Do either of the following example queries using the Yago classes as input
inference rules deliver the require superclass effect you are seeking ?
##Inference Context
##Yago
DEFINE input:inference "http://dbpedia.org/resource/inference/rules/yago#";
SELECT distinct ?x ?type
WHERE {
?x rdfs:label ?lbl .
?x rdf:type ?type.
filter(bif:contains(?lbl, "Cole")).
filter (!bif:exists ((select (1) where { ?x a dbpedia-owl:Person } )))
}
##
##Inference Context
##Yago
DEFINE input:inference "http://dbpedia.org/resource/inference/rules/yago#";
SELECT distinct ?x ?type
WHERE {
?x rdfs:label ?lbl .
?x rdf:type ?type.
filter(bif:contains(?lbl, "Cole")).
filter (!bif:exists ((select (1) where { ?x a foaf:Person } )))
}
Note the following Tutorial slides also provide additional examples on the use
of the Yago classes as input inference rules in queries against DBpedia:
http://virtuoso.openlinksw.com/presentations/SPARQL_Tutorials/SPARQL_Tutorials_Part_2/SPARQL_Tutorials_Part_2.html#%2842%29
I hope this helps ..
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
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On 22 Nov 2010, at 22:45, Rocco Tripodi wrote:
> The query works well:
>
> SELECT distinct ?x
> WHERE {
> ?x rdfs:label ?lbl .
> filter (!bif:exists ((select (1) where { ?x a dbpedia-owl:Person } )))
> filter(bif:contains(?lbl, "Cole"))
> }
>
> but the SPARQL Explorer retrieves also the redirects... such as
> http://dbpedia.org/resource/Nat_Cole
>
> so
>
> OPTIONAL { ?x dbpedia2:redirect : }
> FILTER (!bound(?w))
>
> Unfortunately, the query returns many other Person with other Properties.
> I don't figure out how to express not-Person in DBpedia. Is there a
> SuperClass?.
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