Re: TPF and DBMSes (was Re: Hydra and Shapes)

On 11/24/14 1:32 PM, Ruben Verborgh wrote:
>>> By definition, a “multiple statement triple pattern fragment” does not exist.
>>> http://www.hydra-cg.com/spec/latest/triple-pattern-fragments/#definition
>> Assuming that having looked up the URI above, what I read implies the following isn't possible:
>>
>> ?s ?p ?o.
>> ?o ?p1 ?o2 .
> It is purposely not possible to ask such a question directly to a triple pattern fragments server.

Okay.

> It is possible to ask such a question to a triple pattern fragments client.

Yes, I can see:

SELECT ?a ?b ?i WHERE {
     ?a <http://schema.org/about> ?i.
     ?a <http://schema.org/inLanguage> "ak".
     ?a rdf:type <http://www.wikidata.org/ontology#Article>.
     ?b <http://schema.org/about> ?i.
     ?b <http://schema.org/inLanguage> "ab".
     ?b rdf:type <http://www.wikidata.org/ontology#Article>.
     FILTER(regex(?a, "http://ak.wikipedia.org/wiki/"))
     FILTER(regex(?b, "http://ab.wikipedia.org/wiki/"))
}

via: http://client.wikidataldf.com .


What would make things a little clearer, in regards to SPARQL, is the 
support for SPARQL Protocol URLs that identify query solutions (results).

-- 
Regards,

Kingsley Idehen	
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