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Re: DCAT and VoID

From: Fadi Maali <fadi.maali@deri.org>
Date: Fri, 27 Apr 2012 12:11:51 +0100
Cc: public-gld-comments@w3.org, Michael Hausenblas <michael.hausenblas@deri.org>
Message-Id: <D1EDEAF8-3BFA-4311-B9BC-FA083E572091@deri.org>
To: Alasdair J G Gray <A.Gray@cs.man.ac.uk>

On 27 Apr 2012, at 12:05, Fadi Maali wrote:

> Hi,
> 
> I believe that using them together is beneficial especially when an existing dataset available for example in CSV is converted to RDF. In this scenario I usually describe the resulting RDF dataset in VoiD and the original dataset in DCAT while linking them together using dct:source something like:
> :void-dataset dct:source :dcat-dataset.
> :dcat-dataset dcat:distribution :dcat-dist.
> :dcat-dist dcat:accessURL <url-to-the-csv-file>
> 
> using this representation, the converted RDF representation is linked to its source and therefore can be checked and validated. 
> For example have a look at: http://vmsgov03.deri.ie:8080/data-cube-searcher/index.html?query=howth%20primary%20schools
> notice the link to the original CSV file that is enabled by the link from void to dcat datasets.

Sorry, I think I should provide some more details here. This is a search application on top of RDF data (in Data Cube) While the search is done over RDF as a unifying data model, the data is linked to the original CSV file it was transformed from. A user who finds a result doubtful can check the original CSV (the dcat:Distribution) and clarify whether the value is correct or an error introduced during the conversion.

> 
> Hope this helps!
> 
> Regards,
> Fadi Maali
> 
> On 27 Apr 2012, at 11:59, Michael Hausenblas wrote:
> 
>> Alasdair,
>> 
>>> Are there plans on combining the specifications? 
>> 
>> No, as they target different types of data. DCAT is for describing non-RDF datasets, VoID for RDF datasets.
>> 
>>> Is there a best practice on how to use them together?
>> 
>> DCAT/VoID alignment and best practices are certainly necessary and should/will be done (heads-up: we plan this for an upcoming release of VoID, cf. the long-standing issue on our tracker [1]).
>> 
>> 
>> Cheers,
>> 	   Michael
>> 
>> [1] http://code.google.com/p/void-impl/issues/detail?id=63
>> 
>> --
>> Dr. Michael Hausenblas, Research Fellow
>> DERI - Digital Enterprise Research Institute
>> NUIG - National University of Ireland, Galway
>> Ireland, Europe
>> Tel.: +353 91 495730
>> WebID: http://sw-app.org/mic.xhtml#i
>> 
>> On 24 Apr 2012, at 18:20, Alasdair J G Gray wrote:
>> 
>>> Hi,
>>> 
>>> I have been looking at DCAT and VoID for describing datasets. There seems to be a large amount of overlap between the two specifications. Are there plans on combining the specifications? Is there a best practice on how to use them together?
>>> 
>>> Alasdair
>>> 
>>> Dr Alasdair J G Gray
>>> Research Associate
>>> Alasdair.Gray@manchester.ac..uk
>>> +44 161 275 0145
>>> 
>>> Room 1.17
>>> Kilburn Building
>>> School of Computer Science
>>> University of Manchester
>>> Oxford Road
>>> Manchester
>>> M13 9PL, UK
>>> 
>>> Please consider the environment before printing this email.
>>> 
>> 
>> 
> 
> 
Received on Friday, 27 April 2012 11:12:23 GMT

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