Il 09/03/2010 14:54, Manuel Schölling ha scritto: > Can anybody tell me how to get e.g. the melting temperature of hydrogen? > >
If you look at Wikipedia page (http://en.wikipedia.org/wiki/Hydrogen) it has the value you are looking for. Unfortunately current DBpedia dump does not explicit it (http://dbpedia.org/page/Hydrogen). Actually in the DBpedia resource page there are a lot of related instances. Anyway, as you can see in the Wikipedia page about Hydrogen, it has a specific Infobox (http://en.wikipedia.org/wiki/Template:Infobox_hydrogen). On the contrary Water (http://en.wikipedia.org/wiki/Water) does not belong to any Infoboxes. If you want to ask DBpedia SPARQL endpoint for melting points, you could start with: SELECT * WHERE { { ?s <http://dbpedia.org/property/meltingPoint> ?o } UNION { ?s <http://dbpedia.org/ontology/meltingPoint> ?o } } The "melting point" property has to be present in the corresponding WIkipedia Infobox, such as for example the Drugbox one (http://en.wikipedia.org/wiki/Template:Drugbox). cheers. -- Roberto Mirizzi Ph.D student at Politecnico di Bari (Italy) http://sisinflab.poliba.it/mirizzi ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
