Hi,
I was trying to create a query to retrieve nuclear power plants from dbpedia.
My query was like this.
SELECT * where
{
?concept skos:broader
<http://dbpedia.org/resource/Category:Nuclear_power_stations>.
?subject skos:broader ?concept.
?plant skos:subject ?subject.
?plant a ?type.
?type rdfs:subClassOf yago-class:Station104306080.
}
I did another query for airports where I was able to use rdf:type of
<http://dbpedia.org/ontology/Airport>. I thought I would be able to use
rdfs:type for my query of nuclear power stations, but nuclear power stations
didn't seem to use that concept - not sure why.
From the results of my query I quickly noticed that San Onofre Nuclear power
plant, among others was not in the results.
I looked up San Onofre at this address
http://dbpedia.org/page/San_Onofre_Nuclear_Generating_Station
It is categorized as a dbpedia:Category:Domes
<http://dbpedia.org/resource/Category:Domes> nd
dbpedia:Category:Energy_resource_facilities_in_California
<http://dbpedia.org/resource/Category:Energy_resource_facilities_in_California>.
since dbpedia:Category:Nuclear_power_stations
<http://dbpedia.org/resource/Category:Nuclear_power_stations> skos:broader
dbpedia:Category:Domes <http://dbpedia.org/resource/Category:Domes>
I thought maybe the connection there would let me get San Onofre, but
it seems it would include a lot of other Domes that are not
dbpedia:Category:Nuclear_power_stations
<http://dbpedia.org/resource/Category:Nuclear_power_stations>.
However I also saw this Nuclear Power station (that didn't come up in my
results)
dbpedia:Rancho_Seco_Nuclear_Generating_Station
<http://dbpedia.org/resource/Rancho_Seco_Nuclear_Generating_Station>
which is not a dome, so that doesn't really help.
Bottom line after I got my query for airports together I thought
it wouldn't be a big deal to find other things categorically. I get the
feeling from working this example that is not the case.
Can you see a better way to get the nuclear power stations?
Is this problem due to the way dbpedia information is modeled? Do you think
this data will get better?
Thanks
Brian
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