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

Re: regrets and a new spin on contexts

From: Antoine Zimmermann <antoine.zimmermann@emse.fr>
Date: Wed, 25 Apr 2012 16:02:14 +0200
Message-ID: <4F9803E6.1050604@emse.fr>
To: public-rdf-wg@w3.org
The semantics does not say to what syntax it applies. There are examples 
in TriG given, but does it mean that the semantics apply to RDF Datasets?

This proposal does not make explicit what is the satisfaction relation 
(the ⊨ symbol, \models in LaTeX) that relates interpretations to the 
theories in the logic that they satisfy.

It says: "the rest of the semantics (for triples, graphs, blank nodes, 
etc.) are exactly as in the 2004 semantic specifications"

but this is not enough. As an example, this is not sufficient to 
determine what happen to bnodes (especially bnodes that appear in 
different "named" graph).

There's also the term rdf:Graph used in one example but nothing is said 
about how it is interpreted in the model theory (but ok, it's just an 

Yet anyway, with what's written I am able to extrapolate and what I see 
is essentially the same as my proposal in [1], on top of which the idea 
of "rdf:inherits" has been built.

Also a side remark wrt the form: I would be happier if the semantics use
"I ⊨ G" instead of "I(G) = true", as according to my experience, there 
is an overwhelming majority of authors in the knowledge representation 
field (especially semwebers) using the former and not the latter. It 
would also allow us to avoid introducing the unorthodox notion of 
"occurrence". But this may just be a question of taste.

[1] Dataset semantics. 

Le 23/04/2012 09:45, Pat Hayes a écrit :
> First, regrets for next Wednesday, I will be driving through Texas.
> Second, I have written up essentially the same proposal in a slightly
> different terminology which might (?) be more palatable, anyway it is
> there for inspection at
> http://www.w3.org/2011/rdf-wg/wiki/AnotherSpin
> Pat
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Antoine Zimmermann
ISCOD / LSTI - Institut Henri Fayol
École Nationale Supérieure des Mines de Saint-Étienne
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Received on Wednesday, 25 April 2012 14:02:46 UTC

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