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Re: Querying different SPARQL endpoints

From: Oscar Corcho <ocorcho@fi.upm.es>
Date: Wed, 19 Dec 2012 20:42:15 +0100
To: Hugh Glaser <hg@ecs.soton.ac.uk>, Vishal Sinha <vishal.sinha777@yahoo.com>
CC: "public-lod@w3.org" <public-lod@w3.org>, Daniel Vila <dvila@fi.upm.es>, Asunción Gómez Pérez <asun@fi.upm.es>
Message-ID: <CCF7D568.5C525%ocorcho@fi.upm.es>
Hi all,

As one of the persons in charge of the dataset that Vishal has pointed out
to, and responding to Hugh's comment, you will actually find a description
of this specific dataset at: http://datahub.io/dataset/culturalinkeddata

In fact, according to our own methodological guidelines for generating
Linked Data (that is, eating our own dog food), we always recommend
generating, as commented by Hugh, the sitemap.xml and a void description
for all our datasets, registering them to the CKAN registry.

The data that is available in that SPARQL endpoint is now migrated to
http://datos.bne.es/ (it is data from the Spanish National Library), and
the void description is at http://datos.bne.es/void/bne.ttl



Oscar Corcho
Ontology Engineering Group (OEG)
Departamento de Inteligencia Artificial
Facultad de Informática
Campus de Montegancedo s/n
Boadilla del Monte-28660 Madrid, España
Tel. (+34) 91 336 66 05
Fax  (+34) 91 352 48 19

El 19/12/12 20:19, "Hugh Glaser" <hg@ecs.soton.ac.uk> escribió:

>You can start querying for stuff, but I am guessing that what you mean is
>how can you find out what is in the store without starting to query.
>Well if you are lucky:
>There is a sitemap.xml, which points you at a voiD document that tells
>you some of what you want to know, such as what the topics of the dataset
>For example, our http://acm.rkbexplorer.com/ has
>http://acm.rkbexplorer.com/sitemap.xml which points at
>Or you might be able to find the voiD document some other way.
>I'm afraid you are unlikely to be lucky, though - not many people publish
>voiD data.
>(A while ago we tried to harvest it, and you will find the results at
>Also, looking in the catalogue at http://datahub.io/ may provide
>information you can use.
>On 19 Dec 2012, at 18:28, Vishal Sinha <vishal.sinha777@yahoo.com>
> wrote:
>> There are many public SPARQL endpoints available.
>> For example the cultural linked data:
>> http://cultura.linkeddata.es/sparql
>> How can I know what type of information is available in this dataset.
>> Based on what assumption I can query it?
>> Do I need to know any structure beforehand?
>> Viashal
Received on Wednesday, 19 December 2012 19:42:45 UTC

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