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Re: Reification - whats best practice?

From: Chris Bizer <chris@bizer.de>
Date: Thu, 26 Aug 2004 11:55:54 +0200
Message-ID: <00d601c48b52$e0872970$0f8d2da0@wrz03295>
To: "Eric Jain" <Eric.Jain@isb-sib.ch>, <Patrick.Stickler@nokia.com>
Cc: "rdf-interest" <www-rdf-interest@w3.org>

> Patrick.Stickler@nokia.com wrote:
> > http://www.wiwiss.fu-berlin.de/suhl/bizer/TriQL/
>
> Looks good. I assume this is already implemented somewhere?
>

Not yet, we are still working on the implementation.

We plan to publish a NamedGraphs API as an extension to Jena in about 6
weeks, which will include a TriQL implementation.

Chris

> My main use case for named graphs, incidently, is something like this:
>
> SELECT
>    ?s ?p ?o
> WHERE
>    ?graph ( ?s ?p ?o )
>    ?graph = <urn:lsid:uniprot.org:uniprot:P12345>
>
> Sometimes, the following could also be useful:
>
> SELECT
>    ?graph
> WHERE
>    ?graph ( ?s rdf:type test:Foo .
>             ?s property 'Bar')
>
> I store all statements in what you call named graphs as well, but have
> not so far thought about integrating the concept into the query
> language; may be a good idea. But in any case, I consider this to be a
> separate issue from reification (each statement is part of no more than
> one named graph, in my setup).
>
>
>
>
Received on Thursday, 26 August 2004 09:55:35 UTC

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