W3C home > Mailing lists > Public > public-rdf-wg@w3.org > October 2012

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
> 
> 
> -----------------------------
> http://www.bbc.co.uk
> This e-mail (and any attachments) is confidential and 
> may contain personal views which are not the views of the BBC unless specifically stated.
> If you have received it in 
> error, please delete it from your system.
> Do not use, copy or disclose the 
> information in any way nor act in reliance on it and notify the sender 
> immediately.
> Please note that the BBC monitors e-mails 
> sent or received.
> Further communication will signify your consent to 
> this.
> -----------------------------

-- 
Steve Harris, CTO
Garlik, a part of Experian
+44 7854 417 874  http://www.garlik.com/
Registered in England and Wales 653331 VAT # 887 1335 93
Registered office: Landmark House, Experian Way, Nottingham, Notts, NG80 1ZZ
Received on Thursday, 25 October 2012 14:26:06 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 16:25:52 GMT