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Re: Reification quoting in RDF/N3 was: A note comparing Conceptual Graphs and RDF/Semantic Web

From: R.V.Guha <guha@guha.com>
Date: Thu, 18 Jan 2001 14:18:35 -0800
Message-ID: <3A676BBB.F9FC0C0@guha.com>
To: Tim Berners-Lee <timbl@w3.org>
CC: www-rdf-logic@w3.org, danbri@w3.org


Tim Berners-Lee wrote:

>
> However, in the RDF syntax there is a known problem there.  You can't quote
> something without asserting it. (There is hack Dan Connolly invented of
> <rdf:description aboutEachPrefix=" " bagID="subexpression1"> because
> aboutEachPrefix means it is asserted about anything with a URI which starts
> with a space which is no URIs.)
> This is a known bug and one which I hoped will be fixed in a later release
> of the spec. But I can't find it now I look for it in
> http://www.w3.org/2000/03/rdf-tracking/.
>
> tim

Tim,

 Not sure if this is what you are looking for, but the M&S does allow for
a reification without asserting the statement being reified.

e.g.,
<rdf:Statement id="foo">
    <rdf:subject resource="KingOfFrance"/>
    <rdf:predicate resource="livesIn"/>
    <rdf:object  resource="Paris"/>
</rdf:Statement>

This gives us the reification of (livesIn KingOfFrance Paris) without actually
asserting it.

guha
Received on Thursday, 18 January 2001 17:13:36 GMT

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