Abstract
Schema mappings play a central role in both data integration and data exchange, and are understood as high-level specifications describing the relationships between data schemas. Based on these specifications, data structured under a source schema can be transformed into data structured under a target schema. During the transformation some structural constraints, both contextfree (the structure) and contextual (e.g. keys and value dependencies) should be taken into account. In this work, we present a formalism for schema mapping specification taking into account key constraints and value dependencies. The formalism extends results from [1,2], and our previous work [3,4]. We illustrate the approach by an example.
The work was supported in part by the Polish Ministry of Science and Higher Education under Grant N516 015 31/1553.
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Pankowski, T., Cybulka, J., Meissner, A. (2007). Reasoning About XML Schema Mappings in the Presence of Key Constraints and Value Dependencies. In: Marchiori, M., Pan, J.Z., Marie, C.d.S. (eds) Web Reasoning and Rule Systems. RR 2007. Lecture Notes in Computer Science, vol 4524. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72982-2_35
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DOI: https://doi.org/10.1007/978-3-540-72982-2_35
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