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Re: Querying Named Graph using SPARQL

From: Quentin Reul <Quentin.H.Reul@gmail.com>
Date: Tue, 13 Aug 2013 10:55:47 -0500
Message-ID: <CANk+SXmSg_GYYcHtADaCAJ6tPji_YW1C8EoMAm67kfUUHfJzvg@mail.gmail.com>
To: Axel Polleres <axel@polleres.net>
Cc: semantic-web@w3.org, public-rdf-wg <public-rdf-wg@w3.org>, public-sparql-dev@w3.org
Hi Alex,

Thanks for your feedback. Unfortunately, it doesn't seem to return anything
in AllegroGraph, but I don't know if it is an implementation issue. From
looking at the specification, it seems that the goal it to retrieve similar
triples from distinct graphs as opposed to retrieve the graphs per se.

Cheers,

Quentin


On 13 August 2013 10:48, Axel Polleres <axel@polleres.net> wrote:

> Hi Quentin,
>
> how about just
>
>  SELECT ?G WHERE { GRAPH ?G {} }
>
> (no need to dump all triples, if the only concern is which ?G exist)
>
> BTW, public-sparql-dev@w3.org may be the list you wanted to use.
>
> best,
> Axel
> --
> Dr. Axel Polleres
> url: http://www.polleres.net/  twitter: AxelPolleres
>
>
>
> On 13 Aug 2013, at 17:13, Quentin Reul <Quentin.H.Reul@gmail.com> wrote:
>
> > Hi all,
> >
> > I have been looking at the SPARQL 1.1 specification [1] and I can't find
> a way to retrieve the list of graphs found into a repository. I have
> managed to extract quads from the repository (?g ?s ?p ?o) using
> >         SELECT ?g ?s ?p ?o
> >         WHERE {
> >  GRAPH ?g {?s ?o ?p}
> >         }
> >
> > Is there a better way to extract the list of graphs? If not, I think
> that SPARQL should offer a mechanism to extract a list of graphs in a
> similar way that SQL allows people to.
> >
> > I look forward to hearing from you.
> >
> > Cheers,
> >
> > Quentin
> >
> > [1] http://www.w3.org/TR/sparql11-query/
>
>
Received on Tuesday, 13 August 2013 15:56:21 UTC

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