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Automatic Web service composition (WSC) is a key component of flexible SOAs. We address WSC at the profile/capability level, where preconditions and effects of services are described in an ontology. In its most expressive formulation, WSC has two sources of complexity: (A) a combinatorial explosion of the services composition space, and (B) worst-case exponential reasoning is needed to determine whether...
Automatic composition of semantic Web services should make use of the ontology in which the services are specified. While the approaches can strongly benefit from doing so, they have to deal with the frame and ramification problems, necessitating worst-case exponential reasoning even to determine the outcome of applying a single Web service. The existing approaches to composition either ignore the...
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