Abstract:In this paper we consider the processing of queries posed over multiple information resources that advertise their contents in terms of globally available, domain-specific ontologies. We describe a technique to identify the exact portion of a user's query that may not be answered by the set of available information agents. This is achieved by reasoning over the advertisements of the agents relative to the user's query. Our technique is based on the realization that the set difference of the queries q 1 and q 2… Show more
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