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RE: Datatyping Summary

From: Jeremy Carroll <jjc@hplb.hpl.hp.com>
Date: Tue, 29 Jan 2002 16:14:20 -0000
To: "Dan Connolly" <connolly@w3.org>
Cc: "Graham Klyne" <Graham.Klyne@MIMEsweeper.com>, "Brian McBride" <bwm@hplb.hpl.hp.com>, "RDF core WG" <w3c-rdfcore-wg@w3.org>
Message-ID: <JAEBJCLMIFLKLOJGMELDOEOJCCAA.jjc@hplb.hpl.hp.com>
Responses to simple questions only.

> For one thing, it seems ugly. But that's a matter of taste,
> not one I'd expect folks to find compelling.

Not the way I would implement it either.

> Another thing: when you say ?y != rdf:value do you mean
> the syntactic term isn't rdf:value?


> Or perhaps you're just proving that TDL is implementable,
> and we shouldn't take the proof construction method too
> seriously?


>Maybe something like this?
> 	ex:age rdfs:range dt:decimal.
> 	ex:somebody ex:age "abc".
> ... where a datatypes implementation would be expected to complain
> because that entails
> 	"abc" rdf:type dt:decimal.
> but we know that "abc" isn't a decimal literal.

That's certainly one appropriate test.
Also we may find some entailment tests.

[ Query omitted from this response ]
> > Graham, does this adequately address your concern about self-entailment?
> It does address the self-entailment issue, I suppose.

Thank you for your enthusiasm!

> I don't understand that. I don't see any closed-world assumptions in S.
[[[ 4.9 // idiom P
Notice that for the above definition to be well-formed, we need to be able
to enumerate all datatype mappings.

That is a closed world assumption.

Received on Tuesday, 29 January 2002 11:14:23 UTC

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