A comprehensive semantic framework for d
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Andrea Calì; Domenico Lembo; Riccardo Rosati
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Article
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2005
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Elsevier Science
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English
β 188 KB
A data integration system provides the user with a unified view, called global schema, of the data residing at different sources. Users issue their queries against the global schema, and the system computes answers to queries by suitably accessing the sources, through the mapping, i.e., the specific