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

On 11/24/14 2:36 PM, John Walker wrote:
> Like this?:
> http://client.wikidataldf.com/#startFragment=http%3A%2F%2Fdata.wikidataldf.com%2Fwikidata-sitelinks&query=SELECT%20%3Fa%20%3Fi%20WHERE%20%7B%0A%20%20%20%20%3Fa%20%3Chttp%3A%2F%2Fschema.org%2Fabout%3E%20%3Fi.%0A%20%20%20%20%3Fa%20%3Chttp%3A%2F%2Fschema.org%2FinLanguage%3E%20%22ak%22.%0A%20%20%20%20%3Fa%20rdf%3Atype%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fontology%23Article%3E.%0A%7D 
>
> John

Yes, but it would be nice if we had distinct URLs identifying:

1. query definition
2. query solution.

In addition, what would constitute the SPARQL endpoint, in this 
scenario? By that I mean: an endpoint to which SPARQL-FED queries could 
be directed?


Kingsley
>
> > On November 24, 2014 at 8:07 PM Kingsley Idehen 
> <kidehen@openlinksw.com> wrote:
> >
> >
> > 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
> > Founder & CEO
> > OpenLink Software
> > Company Web: http://www.openlinksw.com
> > Personal Weblog 1: http://kidehen.blogspot.com
> > Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
> > Twitter Profile: https://twitter.com/kidehen
> > Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
> > LinkedIn Profile: http://www.linkedin.com/in/kidehen
> > Personal WebID: 
> http://kingsley.idehen.net/dataspace/person/kidehen#this
> >
> >


-- 
Regards,

Kingsley Idehen 
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog 1: http://kidehen.blogspot.com
Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
Twitter Profile: https://twitter.com/kidehen
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