[ckan-dev] RDF about CKAN datasets: not as good as it used to be.

Sun May 20 18:23:33 BST 2012

Hi, Ross.

I mean the RDF when dereferencing the dataset URI with content negotiation for rdf/XML.

Thanks,
Tim

Sent from my iPhone

On May 20, 2012, at 5:36, Ross Jones <ross.jones at okfn.org> wrote:

> Hi Tim,
> 
> Can I clarify whether you mean the RDF you get directly from the datahub, or a responses you get from the new SPARQL endpoint?  
> 
> Ross.
> 
> On 19 May 2012, at 17:09, Timothy Lebo wrote:
> 
>> CKAN,
>> 
>> A few months ago, the RDF provided when dereferencing a dataset's URI was very useful.
>> It described the datasets using many of the "right" RDF vocabularies (dcterms, void, etc).
>> 
>> The RDF that is returned now no longer has these nice descriptions. 
>> Instead, it seems to be a mindless transcription of the CKAN record.
>> 
>> For example, the older descriptions gave:
>> 
>> <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states>
>>   void:subset [
>>       void:target <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states>, <http://thedatahub.org/dataset/geonames-semantic-web> ;
>>       void:triples 50 ;
>>       a void:Linkset
>>   ], [
>>       void:target <http://thedatahub.org/dataset/dbpedia>, <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states> ;
>>       void:triples 52 ;
>>       a void:Linkset
>>   ], [
>>       void:target <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states>, <http://thedatahub.org/dataset/govtrack> ;
>>       void:triples 52 ;
>>       a void:Linkset
>>   ] ;
>>   void:triples 130005 ;
>> 
>> 
>> 
>> but now it's simply:
>> 
>> <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states>
>>   dct:relation  [
>>       rdf:value "130005" ;
>>       rdfs:label "triples"
>>   ], [
>>       rdf:value "52" ;
>>       rdfs:label "links:dbpedia"
>>   ], [
>>       rdf:value "50" ;
>>       rdfs:label "links:geonames-semantic-web"
>>   ], [
>>       rdf:value "52" ;
>>       rdfs:label "links:govtrack"
>>   ] ;
>> 
>> 
>> My old copies of the dataset descriptions mentioned a "GoLD CKAN 1.0" that was credited for the nicer modeling.
>> 
>> Where did that go? Can we get it back?
>> 
>> Thanks,
>> Tim Lebo
>> 
>> 
>> 
>> 
>> <http://semantic.ckan.net/record/91d2c0de-75a4-4bb6-b260-bc2946e1be8b>
>>   dc:source <http://ckan.net/> ;
>>   opmv:wasGeneratedBy [
>>       opmv:used <http://ckan.net/api/rest/package/farmers-markets-geographic-data-united-states>, <http://ckan.net/api/rest/revision/9c2545b8-ebf1-42bf-ac92-633ff5ceba3f> ;
>>       opmv:wasControlledBy [
>>           a foaf:Agent ;
>>           foaf:name "GoLD CKAN 1.0"
>>       ] ;
>>       opmv:wasPerformedAt [
>>           a time:Instant ;
>>           time:inXSDDateTime "2012-01-31T05:34:32Z"^^xsd:dateTime
>>       ] ;
>>       a opmv:Process
>>   ] ;
>>   a dcat:CatalogRecord ;
>>   dcat:dataset <http://thedatahub.org/dataset/farmers-markets-geographic-data-united-states> ;
>> 
>> …
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> 
> 
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