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Re: All Encompassing / Loose Coupling

From: Adrian Walker <adrianw@snet.net>
Date: Wed, 29 Jun 2005 08:24:46 -0400
Message-Id: <5.0.2.1.2.20050629081346.031bfa10@pop.snet.net>
To: Francois Bry <bry@ifi.lmu.de>
Cc: public-rule-workshop-discuss@w3.org

Bonjour Francois --

Many thanks for your kind comments on the proposal for rule system 
interoperability based on messages 
(http://www.w3.org/2004/12/rules-ws/paper/19/)

At 09:24 AM 6/29/2005 +0200, you wrote:
>I also like the vision of "Rule Spaces" you suggest in Section 2 of
>http://www.w3.org/2004/12/rules-ws/paper/19/, although I doubt it is 
>realizable today as you describe3 it: "A logical model- or fixpoint-theory 
>defining exactly what should be inferred from any given set of rules and 
>facts." Having such aq theory in a both human and machiune processible 
>form is, I believe, not achievable today - maybe in a feew decades.

Well, one example of this is our system that is online at the site 
below.  Its reasoning engine is based on the model- and fixpoint-theory in 
[1], and on the proofs of completeness, soundness and termination of the 
rule interpreter in [2].

The theory was developed a decade or so ago, so it's here now (:-)

                                 -- Adrian

[1]   Towards a theory of declarative knowledge,
in J. Minker, ed., Foundations of Deductive Databases, pp 89-148, (Morgan
Kaufmann, Washington, 1988).

[2]  Backchain Iteration: Towards a Practical Inference Method that is 
Simple Enough to be Proved Terminating, Sound and Complete. Journal of 
Automated Reasoning, 11:1-22



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Adrian Walker
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CT 06011-1412 USA

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Received on Wednesday, 29 June 2005 12:25:03 GMT

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