Hi Brian, two reasons you can't find your powerplant in DBpedia in the same way you found airports:
1. http://en.wikipedia.org/wiki/San_Onofre_Nuclear_Generating_Station has no infobox. Compare e.g. to http://en.wikipedia.org/wiki/Limerick_Nuclear_Power_Plant and look at the wiki markup by clicking on "edit this page". There you see the "infobox NPP". We need those infoboxes to extract the main structured data for a resource and to assign a class in the dbpedia ontology. 2. We don't have nuclear power plants in the dbpedia ontology yet. As I wrote in my email to the mailinglist an hour ago, the ontology and the mappings were defined manually, and we just started with the classes/infoboxes that seems most relevant to us, since that's a lot of work. So even the Limerick Nuclear Power Plant won't show up in the ontology dataset at the moment. And we don't have a user interface for the community to help with the mappings yet. If you want to help, you can "design" the power plant class and all according properties for the dbpedia ontology (see http://wiki.dbpedia.org/Ontology) and provide mappings from the related infoboxes to ontology properties. I will include them in our mapping-repository and extract your data. Cheers, Georgi -- Georgi Kobilarov Freie Universität Berlin www.georgikobilarov.com > -----Original Message----- > From: Brian Hardy [mailto:[email protected]] > Sent: Saturday, February 07, 2009 7:02 PM > To: [email protected] > Subject: [Dbpedia-discussion] A modeling issue? > > > 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_Cal > ifornia>. > > 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 ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
