The Knowledge Engineering Review
A logical characterisation of ordered disjunction
AI Communications - Answer Set Programming
Supporting ontology-based semantic matching of web services in movilog
IBERAMIA-SBIA'06 Proceedings of the 2nd international joint conference, and Proceedings of the 10th Ibero-American Conference on AI 18th Brazilian conference on Advances in Artificial Intelligence
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We describe a modified Grid architecture that allows the specification and enforcement connection policies to Grid on Web Services. This is accomplished by interposing a policy enforcement engine between a calling application and the relative client stubs. Only service requests need be analized and filtered. Connection policies are conveniently expressed in the declarative policy specification language PPDL which allows expressing simple preferences and integrity constraints. PPDL policies are evaluated by translating them into a Logic Program with Ordered Disjunctions and calling the psmodels interpreter. This process is completely transparent to both client applications and Web/Grid services. There are clear advantages in having the connection logic expressed declaratively and externally to applications.