We propose a novel concise specification of semantic web services conforming to the WSMO standard using the Flora-2 language, as well as a precise logical definition of what it means for a goal to match a web service. Our innovative usage of Flora-2 allows very short but expressive descriptions of both goals and web service capabilities, which are then used by a matching engine to discover which web services can satisfy a given goal. The matching engine, using the meta-level F-logic inferencing capabilities of the underlying Flora-2 reasoner, is very efficient and has a very concise definition itself.
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