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Re: Signalling entailment in queries

From: Chimezie Ogbuji <ogbujic@ccf.org>
Date: Tue, 20 Jul 2010 21:44:01 -0400
To: "Gregory Williams" <greg@evilfunhouse.com>, "Sandro Hawke" <sandro@w3.org>
cc: "Birte Glimm" <birte.glimm@comlab.ox.ac.uk>, "SPARQL Working Group" <public-rdf-dawg@w3.org>
Message-ID: <C86BC921.12829%ogbujic@ccf.org>
Comments inline below

On 7/20/10 5:13 PM, "Gregory Williams" <greg@evilfunhouse.com> wrote:
> I've always considered it a feature that an endpoint could use entailment on
> the underlying data and the user would use the same query syntax. I'd be very
> hesitant about a syntax that requires the user to specify an entailment regime
> to use, especially if the system only supports one entailment regime and will
> throw an error if you request others.

I don't think the user has to specify an entailment regime, but they should
be able to and there should be some order of precedence that determines
which is used (in the same way we do with datasets).  It seems okay for the
server to throw an error if an unsupported entailment regime is requested.

> I don't want to be in the position of
> trying to submit a query by hand and having to guess the supported entailment
> repeatedly or having to download the service description and pick through it
> to figure out what entailment regime the endpoint supports.

See above.

-- Chime


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Received on Wednesday, 21 July 2010 01:44:46 UTC

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