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Re: Web Semantics of Datasets (v0.2)

From: Pat Hayes <phayes@ihmc.us>
Date: Wed, 12 Oct 2011 08:48:22 -0500
Cc: Sandro Hawke <sandro@w3.org>, Ivan Herman <ivan@w3.org>, public-rdf-wg <public-rdf-wg@w3.org>
Message-Id: <3B6FC8FF-C666-4D11-A1DA-2E67761AFF6E@ihmc.us>
To: Alex Hall <alexhall@revelytix.com>
It actually names the named graph, ie the pair <URIref, graph>. This allows two copies of a graph to have different names. But it does not provide for g-boxes and updating and all that time-relative stuff. In a nutshell, g-boxes have state. Nothing else in current RDF or named graphs has state.


On Oct 12, 2011, at 7:03 AM, Alex Hall wrote:

> On Wed, Oct 12, 2011 at 2:14 AM, Pat Hayes <phayes@ihmc.us> wrote:
> > Doesn't it make sense that when a TriG file says:
> >
> >   <http://example.org/a> { <s> <p> <o>. }
> >
> > it means that "http://example.org/a" names a g-box, and for the purposes
> > of this TriG file, that g-box should be understood as holding the graph
> > consisting of that triple?
> >
> > If not, then what do you think that TriG file means (or should mean) ?
> Well, the TriG document talks about 'named graphs' and refers to the Named Graph page, which says that the semantics are given in the Carroll/Bizer/Hayes/Stickler paper (though it does have a broken link, I must admit), which in turn is quite explicit that this means that the name URI names the *graph*, and indeed is a rigid designator of the graph. So, no g-boxes there.
> I thought that the Named Graphs paper stated that the URI names the mapping from the URI to the graph, not the graph itself.  Am I mistaken there?  Is there a distinction between the two?
> -Alex

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Received on Wednesday, 12 October 2011 13:48:55 UTC

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