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ICDT
2007
ACM

XML Schema Mappings in the Presence of Key Constraints and Value Dependencies

10 years 3 months ago
XML Schema Mappings in the Presence of Key Constraints and Value Dependencies
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 context-free (the structure) and contextual (e.g. keys and value dependencies) should be taken into account. In this work, we present a new formalism for the schema mapping specification. We propose a new class of tree-pattern formulas in order to extend semantics of XML schema mappings by specification of key constraints and value dependencies. We discuss foundations of the method and propose a key-preserving transformation algorithm.
Tadeusz Pankowski, Jolanta Cybulka, Adam Meissner
Added 08 Jun 2010
Updated 08 Jun 2010
Type Conference
Year 2007
Where ICDT
Authors Tadeusz Pankowski, Jolanta Cybulka, Adam Meissner
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