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Lecture Notes in Computer Science
Query processing plays a fundamental role in current information systems that need to access independent and heterogeneous databases. This paper presents a new approach to querying heterogeneous databases that maps the semantics of query objects onto database schemas. The sematics is captured by the definitions of classes in an ontology, and a similarity function identifies not only equivalent but also semantically similar classes associated with a user's request. These similar classes are thendoi:10.1007/3-540-48050-1_25 fatcat:sjiuc7cmbfdgtl6tzpvqdehepi