W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > March 2002

RE: Unasserted triples, Contexts and things that go bump in the night.

From: Jeremy Carroll <jjc@hplb.hpl.hp.com>
Date: Wed, 20 Mar 2002 10:38:42 -0000
To: "Pat Hayes" <phayes@ai.uwf.edu>, <w3c-rdfcore-wg@w3.org>
Message-ID: <JAEBJCLMIFLKLOJGMELDMEGOCDAA.jjc@hplb.hpl.hp.com>
Syntactic comments only ....

> We 
> could encode this in N-triples by having two ways to terminate a 
> triple, so that
> ex:judy ex:age ex:whatever .
> is an asserted triple but
> ex:judy ex:age ex:whatever ;
> is an unasserted triple. 

I would prefer

- <subj> <pred> <obj> .

as an unasserted triple.

> I confess to having no idea how to represent 
> something analogous to this in RDF/XML, however.

Liar, (or should that be "balls" :) )
You came up with a number of proposals that all seem fine.

My early preference is ...

> Another possibility is to allow certain namespaces to be declared to 
> be dark, so that any triple using a property from a dark namespace is 
> considered to be unasserted. Again, this does not require any change 
> to the syntax, but only some extra conventions to be added to the 
> language. 

This could be a namespace prefix rather than the namespace e.g.

<rdf:RDF xmlns:eg="http://example.org/" xmlns:egdark="http://example.org/"
     <rdf:Description eg:aserted="foo" egd:unasserted="bar" />


Received on Wednesday, 20 March 2002 05:38:58 UTC

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