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Re: P.S. Re: Model Theory

From: Dan Connolly <connolly@w3.org>
Date: 03 Jan 2002 14:52:35 -0600
To: Ian Horrocks <horrocks@cs.man.ac.uk>
Cc: www-webont-wg@w3.org
Message-Id: <1010091156.3381.12.camel@dirk>
Amen to this:

On Thu, 2002-01-03 at 13:14, Ian Horrocks wrote:
> It might also be worth adding that in the early days of DAML+OIL the
> group wasted a lot of time discussing/arguing about the meaning of
> RDFS constructs, such as range and domain, whose semantics was (then)
> only informally specified. I would suggest that we don't want to
> repeat that mistake with OWL.
> Moreover, formalising the semantics of range and domain made it clear
> to all concerned that the most obvious reading of the informal
> specification had unintended and undesirable consequences. The RDF WG
> has since fixed this problem, but they may never have known about it
> without the formalisation.
> Ian

At the end of the day, we want a document that causes this
technology to get deployed. Experience (as noted above) has
convinced me that a model theory (and/or axiomatic semantics...
I'm still studying both approaches) is cost-effective
in persuit of that goal.

Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Thursday, 3 January 2002 15:52:32 UTC

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