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 E0 to the vocabulary of M, creating a set of constraints C0 in such a way that the schema mapping for E0 is correct. Then, we show how to compute the new version of the constraints of M to accommodate C0 so that all schema mappings, including that for E0, are correct. We solve both problems for subset and cardinality constraints and specific families of schema mappings. © Springer-Verlag 2009.
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Casanova, M. A., Lauschner, T., Paes Leme, L. A. P., Breitman, K. K., Furtado, A. L., & Vidal, V. M. P. (2009). A strategy to revise the constraints of the mediated schema. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 5829 LNCS, pp. 265–279). https://doi.org/10.1007/978-3-642-04840-1_21
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