Schema Merging Based on Semantic Mappings

Authors:
Nikos Rizopoulos;Peter Mcbrien
Affiliations:
Dept. of Computing, Imperial College London, London SW7 2AZ;Dept. of Computing, Imperial College London, London SW7 2AZ
Venue:
BNCOD 26 Proceedings of the 26th British National Conference on Databases: Dataspace: The Final Frontier
Year:
2009

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Abstract

In model management, the Merge operator takes as input a pair of schemas, together with a set of mappings between their objects, and returns an integrated schema. In this paper we present a new approach to implementing the Merge operator based on semantic mappings between objects. Our approach improves upon previous work by (1) using formal low-level transformation rules that can be translated into higher-level rules and (2) specifying precise BAV mappings, which merge schemas without any information loss or gain.