W3C home > Mailing lists > Public > public-rdf-wg@w3.org > November 2013

Re: RDF 1.1 Primer

From: Yves Raimond <yves.raimond@bbc.co.uk>
Date: Mon, 25 Nov 2013 10:37:01 +0000
To: Pat Hayes <phayes@ihmc.us>
CC: Guus Schreiber <guus.schreiber@vu.nl>, "yves.igetenoughspam.raimond@gmail.com" <yves.igetenoughspam.raimond@gmail.com>, RDF WG <public-rdf-wg@w3.org>
Message-ID: <1385375820.17202.25.camel@RD000190>
Hello Pat,

First of all, many thanks for the comments - we'll go through them in
more details in the coming days. I just had one question about the
following:

[snip]


> "We can then make statements about these two graphs, for example adding license and provenance information:
>
>         <http://example.com/bob> <is published by> <http://example.org>.
>         <http://example.com/bob> <has license> <http://creativecommons.org/licenses/by/3.0/>."
>
> <hair tearing> AAAARRRRGGGH</hair tearing> NO WE CAN'T. Or at least, this use is NOT SUPPORTED BY RDF with the specs in their current state. That 'metadata' use works ONLY when we know that the "identifying" graph IRIs denote their graphs, and WE HAVE EXPLICITLY SAID THAT RDF DOES NOT ASSUME THIS. A conforming RDF engine would be perfectly conforming if it refused to treat those subject IRIs as denoting the graph in these triples.  There is NOTHING in the RDF specs that say that a general IRI must be taken to denote what it conventionally identifies.  We do this only for datatype IRIs, and even getting that much into the specs was an uphill struggle; and in the case of graph labels in a dataset, we explicitly warn people to not expect this to be true (because it often isn't.) I know the Primer has to be simple, but please let us not put actual lies into it.
>

"RDF does not assume this" doesn't mean that RDF explicitly forbids it,
no? I thought that we deliberately left that open for people to use
graph IRIs as they see fit. If it's an 'actual lie' (which I really
don't think it is), then it's a bit of an issue, as a lot of people use
graphs to do exactly that.

Best,
Yves


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Received on Monday, 25 November 2013 10:37:45 UTC

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