Lee Feigenbaum wrote: > Kingsley Idehen wrote: >> Sid wrote: >>> Well when i query a URI in SPARQL I generally get all the "things" >>> that are related to the resource(unless I really narrow it down). >>> It would be nice that if I am loking at infoboxes for resources like >>> http://dbpedia.org/page/Berlin I shouldnt first get all the >>> information LINKED to that URI...If i want only infobox data for >>> this reosurce only, then querying then mentioning the infobox data >>> set clause would give me that(Which is not the same as specyfying a >>> RDF graph since datasets arent really there I presume and have been >>> converted to RDF) .... >>> >>> The only way to do this right now is to download some data in the >>> local HDD and convert it to RDF and query the data :).... Is there a >>> simple fix to just narrow this and get what I want?(Perhaps an extra >>> attribute related to each resource that tells me about the dataset >>> also? and something like in the SPARQL END POINT ) >> Are you asking for a URI like: >> http://dbpediar.org/resource/Berlin/<some-property> ? If not, please >> be clearer, this is a database, and it has a query language, and so >> you should be able to query and filter (including inference rules >> exploitation). > > Seems clear to me :) Sid is asking how he can query one of the > specific datasets listed at the URI in his first message: > > http://wiki.dbpedia.org/DatasetsLoaded?v=ttm Each data set should map to a Graph IRI, at least those where my guidelines re. data partitioning with the Quad Store. Naturally, this guideline wasn't applied to the live DBpedia instance since its quite old. More recent loads (e.g. the lod.openlinksw.com instance) are based on this approach (but not functional it seems). We should have:
Group: <http://dbpedia.org> Graph IRI: <derived-from-actual-dataset-source-file-name> I am not currently seeing that in the VoiD graph, so I'll look into what's amiss here re. external access to this data via SPARQL (worst case DESCRIBE <Graph-IRI> should reveal) . You should be able to get at the Graph Group and the Graph IRIs (within groups) . Once this is resolved, what you see in the lod instance will make its way to DBpedia live after the next update, and DBpedia2 in the interim. Kingsley > > ...without getting triples from some of the other datasets. (In sid's > case, he's interested only in triples coming from the infobox part of > the dataset.) > > Lee > >> >> Kingsley >>> >>> >>> >>> Thanks and regards >>> >>> On Fri, May 15, 2009 at 10:57 AM, Kingsley Idehen >>> <[email protected] <mailto:[email protected]>> wrote: >>> >>> Lee Feigenbaum wrote: >>> >>> Kingsley Idehen wrote: >>> >>> Georgi Kobilarov wrote: >>> >>> Hello Sid, >>> >>> AFAIK we don't expose the data in >>> named graphs, so you >>> can't query the public sparql endpoint for triples >>> from a particular dataset. >>> >>> At least not that I was aware of. >>> Kingsley? >>> >>> http://dbpedia2.openlinksw.com:8895/void/Dataset will >>> expose the Graph IRIs. >>> or >>> http://lod.openlinksw.com/void/Dataset (follow the DBpedia >>> Graph Group). >>> >>> >>> (asking on sid's behalf since I was trying to help him/her out >>> on IRC) >>> >>> I don't see anything listed there that leaps off the page as >>> being restricted to the infobox triples, which I believe is >>> the particular dataset that sid is interested in. The URIs on >>> http://dbpedia2.openlinksw.com:8895/void/Dataset seem to be >>> more content-oriented than dataset oriented. >>> >>> >>> The first level is the Graph Group, then within the Graph Group >>> you have IRIs. I am assuming he is seeking specific graph names? >>> >>> Kingsley >>> >>> >>> Lee >>> >>> >>> Kingsley >>> >>> Best, >>> >>> Georgi >>> >>> -- >>> Georgi Kobilarov >>> >>> Freie Universität Berlin >>> >>> www.georgikobilarov.com >>> <http://www.georgikobilarov.com> >>> >>> *From:* Sid [mailto:[email protected] >>> <mailto:[email protected]>] >>> *Sent:* Thursday, May 14, 2009 2:19 AM >>> *To:* [email protected] >>> <mailto:[email protected]> >>> *Subject:* [Dbpedia-discussion] Querying data sets on >>> dbpedia >>> >>> Hi, >>> I need to know how to just query a specific DBPedia >>> data set of the many mentioned here >>> http://wiki.dbpedia.org/DatasetsLoaded?v=ttm. I am not >>> getting any success using the from clause. 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