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Re: TriG and default graphs

From: Steve Harris <steve.harris@garlik.com>
Date: Thu, 25 Oct 2012 15:25:36 +0100
Cc: <public-rdf-wg@w3.org>
Message-Id: <143CCA61-724E-482C-AE5D-E12D14A945DC@garlik.com>
To: Yves Raimond <yves.raimond@bbc.co.uk>
In principle I'm +1 on this, but we don't use default/anonymous graphs either, so I'd like to hear from people who do. Would this would be an OK solution?

It would certainly simplify the spec text, and it would make the parallel with NQuads more obvious.

I have no feel for how many TriG files there out in the wild with anonymous graph contents.

- Steve

On 24 Oct 2012, at 17:29, Yves Raimond wrote:

> Hello!
> Just jumping on the last point that was mentioned in today's telecon, about possibly not providing any statements about what to do with a TriG default graph. I have the feeling that not doing that actually defeats the point of having a default graph at all. 
> If we can't get to an agreement on that first point, I'd really like to understand what the rationale is behind supporting default graphs in TriG, apart from backward-compatibility. When used at the BBC, default graphs have proven to be a very confusing feature, and not having any statement on what do with them would only add to the confusion. 
> All the dataset metadata that is supposed to go in that default graph could perfectly go in another named graph, e.g. identified by the URI of the sd:Dataset in the SPARQL end-point you're generating a TriG dump from, or the URI of the TriG file itself. Personally, I'd favour a 'flat' version of TriG, where everything is a named graph.
> Best,
> Yves
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Steve Harris, CTO
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Received on Thursday, 25 October 2012 14:26:06 UTC

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