Well Specified Semantics for a Rule Engine

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Well Specified Semantics for a Rule Engine

Adrian Walker

Dave --

At 09:09 AM 1/26/2006 +0000, you wrote on [jena-dev]:
>Until recently my hope was that the new RIF working group would develop
>a standardized rule language suitable for RDF with a well specified
>semantics. We would have then considered migrating Jena to support that
>core, though we would likely still need procedural extensions to cover
>our own use cases. That's now less likely given the actual focus of RIF
>but we haven't decided on a plan B yet.

For the well specified semantics Plan B, you may like to consider the
approach in:

    Backchain Iteration: Towards a Practical Inference Method that is
Simple Enough to be
    Proved Terminating, Sound and Complete. Journal of Automated Reasoning,

The paper describes a model-theoretic semantics for what an engine _should_
do, and an engine that is proved to do that.

The paper is hard to find on the web, but if this is of interest, I'll be
glad to send you a scanned in .doc version.  Let me know.

The engine in the Internet Business Logic system is based on the one in the

HTH.    Cheers,

                                        -- Adrian

PS:  www.w3.org/2004/12/rules-ws/paper/19 may also be of interest

PPS:  Apologies for cross-posting, but this topic really impacts a lot of
future SW stuff

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Adrian Walker
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