Sid wrote: > Lee got it right.... > Kingsley: So the final thing is this... I state again to make it > exactly clear...As an example... > The data set http://downloads.dbpedia.org/3.2/en/infobox_en.nt.bz2 has > the infobox information extracted from various wikis... So If i query > in SPARQL with : <http://dbpedia.org/resource/Berlin> and specify > the data set in the triple to be Graph IRI: > <derived-from-actual-dataset-source-file-name> then I should get the > triples only from that data set... > This should be REALLY useful... users will not not have to do a LOT > of extra processing....! Yes, and that's what's supposed to be in place re. DBpedia2 and LOD prior to DBpedia Live. The problem is that we hadn't actually performed the DBpedia reloads on DBpedia2 and LOD that make this happen. The other interesting deliverable (now that I've been able to look into this properly) is that the source files we are preparing also include xxx.graph files that also expose Graph IRIs.
Kingsley > > Regards > Sid > > On Fri, May 15, 2009 at 2:32 PM, Kingsley Idehen > <[email protected] <mailto:[email protected]>> wrote: > > 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 > <http://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]> > <mailto:[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> > <http://www.georgikobilarov.com> > > *From:* Sid > [mailto:[email protected] <mailto:[email protected]> > <mailto:[email protected] > <mailto:[email protected]>>] > *Sent:* Thursday, May 14, 2009 2:19 AM > *To:* > [email protected] > <mailto:[email protected]> > > <mailto:[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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