[ckan-dev] VoiD metadata at http://semantic.ckan.net/sparql

[Cristina Sarasua]

Hi,

I would like to ask whether "dcat:distribution" is the only property 
that can be used to get the VoiD metadata of LOD data sets in the Data 
Hub SPARQL endpoint.

Thanks in advance.

Kind regards,

Cristina


Am 08.07.2013 13:12, schrieb Cristina Sarasua:
>
> Hi,
>
> I would like to ask something about the VoiD descriptions that can be 
> found querying the Data Hub SPARQL endpoint 
> <http://semantic.ckan.net/sparql>.
>
> I queried the current endpoint and I saw that the VoiD metadata of a 
> data set can be found looking at triples like:
>
> <http://linkeddata.openlinksw.com:80/about/id/entity/http/datahub.io/dataset/data-gov-ie> 
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> 
> <http://www.w3.org/ns/dcat#Dataset> .
>
> <http://linkeddata.openlinksw.com:80/about/id/entity/http/datahub.io/dataset/data-gov-ie> 
> <http://www.w3.org/ns/dcat#distribution> <http://data-gov.ie/void.ttl> .
>
> taking into account that the value of a dcat:distribution property can 
> be any "accessible form of a dataset" as defined by the DCAT 
> vocabulary <http://www.w3.org/TR/vocab-dcat/>, and therefore, it can 
> represent the SPARQL endpoint, the RDF dump or the VoiD file of a data 
> set, among other things. And, in some cases, the rdf:Resource used for 
> specifying the location of the VoiD description is not a VoiD .ttl 
> file, but a directory instead.
>
> So, if I want to query the "VoiD metadata space" using the Data Hub 
> endpoint, in order to find the data sets that satisfy a particular 
> requirement, I can parse the VoiD metadata that I find as described, 
> and then execute queries over the collected metadata.
>
> I saw that in February there was a thread 
> <http://lists.okfn.org/pipermail/ckan-dev/2013-February/003980.html> 
> about VoiD at CKAN, where some external resources were mentioned. Is 
> what I described, currently the best way to access VoiD information at 
> the Data Hub, or should I consider something else?
>
> Thanks in advance.
>
> Kind regards,
>
> Cristina
>
>
>
>
>
>
> -- 
> Cristina Sarasua
>
> Institute for Web Science and Technologies (WeST)
>
> Universität Koblenz-Landau
> Universitätsstraße 1
> 56070 Koblenz
> Germany
>
> e:csarasua at uni-koblenz.de
> p: +49 261 287 2772
> f: +49 261 287 100 2772
> w:http://west.uni-koblenz.de  
>
>


-- 
Cristina Sarasua

Institute for Web Science and Technologies (WeST)

Universität Koblenz-Landau
Universitätsstraße 1
56070 Koblenz
Germany

e: csarasua at uni-koblenz.de
p: +49 261 287 2772
f: +49 261 287 100 2772
w: http://west.uni-koblenz.de

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