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Re: abstract model

From: Jan Grant <Jan.Grant@bristol.ac.uk>
Date: Tue, 12 Sep 2000 11:03:13 +0100 (BST)
To: "McBride, Brian" <bwm@hplb.hpl.hp.com>
cc: "RDF Interest (E-mail)" <www-rdf-interest@w3.org>
Message-ID: <Pine.GHP.4.21.0009121055510.15453-100000@mail.ilrt.bris.ac.uk>
On Mon, 11 Sep 2000, McBride, Brian wrote:

> 6.  There is a mapping called Reification which a maps
>     each member s of Statements onto a unique member r
>     of Resources.  r is known as the reficiation of s.
>     Here unique means given s1 and s2 members of
>     Statements, Reification(s1) = Reification(s2) iff
>     s1 = s2. 

I don't read the RDF spec to imply this. Instead something like:

	there is a relationship Reifies over {(r,s)} where
	r Reifies s (wrt a model m)
		iff
	m contains the statements
		r -[rdf:subject]-> (subject(s))
		r -[rdf:predicate]-> ...etc

in other words, "a reification" instead of "the reification" is the
right way to look at this.

jan

PS. the reason I prefer this weaker definition is because I'm slightly
cautious about the mechanics of retrieving s given only the URI of its
reification, r.

-- 
jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/
Tel +44(0)117 9287163 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk
Strive to live every day as though it was last Wednesday.
Received on Tuesday, 12 September 2000 06:03:19 GMT

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