Rewriting queries using views in description logics
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Information Integration Using Logical Views
ICDT '97 Proceedings of the 6th International Conference on Database Theory
A Case-Based Approach to Information Integration
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
COOPIS '97 Proceedings of the Second IFCIS International Conference on Cooperative Information Systems
A Conceptual Indexing Method for Content-Based Retrieval
DEXA '99 Proceedings of the 10th International Workshop on Database & Expert Systems Applications
A semantics and complete algorithm for subsumption in the classic description logic
Journal of Artificial Intelligence Research
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We discuss and analyse cooperation strategies for rewriting queries in a mediator architecture. According to this approach, the mediated schema of each mediator is dynamically updated through the cooperation with information sources and other mediators, strongly influenced by the queries submitted by a consumer. This approach allows a mediator to face systems where information sources and consumer needs are dynamic. From the analysis of different cooperation strategies arises that it is more efficient and effective to directly cooperate with information sources when the sources are few. Otherwise, it is more efficient to cooperate with other mediators.