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Re: SPARQL endpoint discovery - two suggestions

From: Graham Klyne <graham.klyne@zoo.ox.ac.uk>
Date: Mon, 05 Dec 2011 09:26:24 +0000
Message-ID: <4EDC8E40.5020407@zoo.ox.ac.uk>
To: Timothy Lebo <lebot@rpi.edu>
CC: W3C provenance WG <public-prov-wg@w3.org>
On 02/12/2011 21:50, Timothy Lebo wrote:
>>
>> 2b in RDF
>>
>> An RDF resource may refer to its own provenance SPARQL endpoint; e.g.
>>
>>   ex:someEntity prov:hasProvenance
>>     [ void:sparqlEndpoint<http://example.info/provenance/sparql/>  ]
>>
>> Here, a blank node is introduced to denote the full provenance triple set.  An explicit URI could be used.
>
>
> I think here we want to point to a GraphContainer, i.e. a GRAPH in a SPARQL endpoint.

IS what you have in mind different fropm the SPARQL notion of a dataset? 
(Roughly, an assemblage of a default graph and some named graphs, associated 
with a SPARQL endpoint.)

> I'm now not sure if sd:NamedGraph is a Graph (in the RDF Abstract Graph sense) or a GraphContainer (in the INSERT INTO GRAPH sense).

I think this is at the heart of what the RDF WG need to decode w.r.t. "named 
graphs".

> This is the source of the problem that I try to treat in the URLs I just sent you.

I'm tagging those messages to come back to later.  This week, I'm pl;anning to 
get head-down on some development work.

#g
--


>
> Best,
> Tim
>
> http://prefix.cc/sd
>
>
>
> p.s. repeated here for archiving:
>
>
> Listed so that most recent is first:
>
>
> http://www.w3.org/2011/prov/wiki/Reflections_from_RDF-WG_F2F2
> is a slightly "from scratch" perspective on the problem of "getting at" a named graph hidden behind a SPARQL service.
>
>
> http://www.w3.org/2011/prov/wiki/Using_named_graphs_to_model_Accounts
> wrestles with the different meanings of "named graph" - one of which is the RDF 1.1 WG's GraphContainer (that currently doesn't have a standard way to identify)
>
>
> https://github.com/timrdf/csv2rdf4lod-automation/wiki/Naming-sparql-service-description%27s-sd:NamedGraph
> offers a technique to awww:identify the named graph within the context of a SPARQL service
>
>
>
>
>
Received on Monday, 5 December 2011 15:01:47 GMT

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