3 Dynamic Semantic Web Services Problem: Current Web Service clients must still be programmed by people to interact with each new service –UDDI does not enable software clients to find services in terms of their inputs, outputs, preconditions, effects, other constraints –WSDL descriptions do not contain enough information about what are the semantics of service inputs, outputs In order to dynamically invoke and compose services, service clients must be able to automatically –Find services having the desired effects, given inputs the client can provide –Reason about which information the client possesses is required in messages to the service, and provide it in the appropriate forms.
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