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Lecture Notes in Computer Science
Changes of semantics in data sources further complicate the semantic heterogeneity problem. We identify four types of semantic heterogeneities related to changing semantics and present a solution based on an extension to the Context Interchange (COIN) framework. Changing semantics is represented as multi-valued contextual attributes in a shared ontology; however, only a single value is valid over a certain time interval. A mediator, implemented in abductive constraint logic programming,doi:10.1007/978-3-540-31839-2_10 fatcat:6ggax6liy5e35dpbyngrn6hnxe