Abstract
In this paper we study the problem of schema exchange, a natural extension of the data exchange problem to an intensional level. To this end, we first introduce the notion of schema template, a tool for the representation of a class of schemas sharing the same structure. We then define the schema exchange notion as the problem of (i) taking a schema that matches a source template, and (ii) generating a new schema for a target template, on the basis of a set of dependencies defined over the two templates. This framework allows the definition, once for all, of generic transformations that work for several schemas. A method for the generation of a “correct” solution of the schema exchange problem is proposed and a number of general results are given. We also show how it is possible to generate automatically a data exchange setting from a schema exchange solution. This allows the definition of queries to migrate data from a source database into the one obtained as a result of a schema exchange.
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Papotti, P., Torlone, R. (2007). Schema Exchange: A Template-Based Approach to Data and Metadata Translation. In: Parent, C., Schewe, KD., Storey, V.C., Thalheim, B. (eds) Conceptual Modeling - ER 2007. ER 2007. Lecture Notes in Computer Science, vol 4801. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75563-0_23
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DOI: https://doi.org/10.1007/978-3-540-75563-0_23
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