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....!
Regards
Sid
On Fri, May 15, 2009 at 2:32 PM, Kingsley Idehen <[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 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. Is there a
>>>> way to do that?
>>>>
>>>>
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>>>>
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>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Regards,
>>>>
>>>> Kingsley Idehen Weblog:
>>>>
>>>> http://www.openlinksw.com/blog/~kidehen<http://www.openlinksw.com/blog/%7Ekidehen>
>>>> <http://www.openlinksw.com/blog/%7Ekidehen>
>>>> President & CEO OpenLink Software Web: http://www.openlinksw.com
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
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>>>
>>>
>>>
>>
>
> --
>
>
> Regards,
>
> Kingsley Idehen Weblog:
> http://www.openlinksw.com/blog/~kidehen<http://www.openlinksw.com/blog/%7Ekidehen>
> President & CEO OpenLink Software Web: http://www.openlinksw.com
>
>
>
>
>
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