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Re: a simple question

From: <ewallace@cme.nist.gov>
Date: Tue, 2 Dec 2003 10:55:23 -0500 (EST)
Message-Id: <200312021555.KAA11895@clue.msid.cme.nist.gov>
To: public-sws-ig@w3.org, www-rdf-rules@w3.org


Titi Roman <dumitru.roman@deri.ie> asserted:
>...in OWL-S, a rule language should be deployed only for the reason that
> it may help in describing preconditions and effects in a more comfortable 
> way(i.e. not having to use for example in OWL-S Profile the definitions of 
>"preconditions" and "effect", but rather considering the rule:
>
>_if a buyer has a valid Account and a valid Credit Card, then he can buy the 
>book_
*snip*
>) or for the reason that it gives more expressivity (if yes, please explain 
>what this expressivity means and how it is achieved or can be achieved). 
 
The rule above only expresses preconditions and not any effects of executing
the service.  Thus providing no understanding of what it means to "buy
the book" and illustrating less than half of what needs to be expressed
by preconditions and effects.  Even this just addresses the ServiceProfile 
bit of DAML-S.  There is also a need for rules to express parts of 
ProcessModels in the ServiceModel component.

-Evan

Evan K. Wallace
Manufacturing Systems Integration Division
NIST
Received on Tuesday, 2 December 2003 10:55:25 GMT

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