Abstract
In this paper, we address the problem of changing the constraints of a mediated schema M to accommodate the constraints of a new export schema E 0. We first show how to translate the constraints of E 0 to the vocabulary of M, creating a set of constraints C 0 in such a way that the schema mapping for E 0 is correct. Then, we show how to compute the new version of the constraints of M to accommodate C 0 so that all schema mappings, including that for E 0, are correct. We solve both problems for subset and cardinality constraints and specific families of schema mappings.
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Casanova, M.A., Lauschner, T., Leme, L.A.P.P., Breitman, K.K., Furtado, A.L., Vidal, V.M.P. (2009). A Strategy to Revise the Constraints of the Mediated Schema. In: Laender, A.H.F., Castano, S., Dayal, U., Casati, F., de Oliveira, J.P.M. (eds) Conceptual Modeling - ER 2009. ER 2009. Lecture Notes in Computer Science, vol 5829. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04840-1_21
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DOI: https://doi.org/10.1007/978-3-642-04840-1_21
Publisher Name: Springer, Berlin, Heidelberg
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