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On the logical foundations of schema integration and evolution in heterogeneous database systems

  • Laks V. S. Lakshmanan
  • Fereidoon Sadri
  • Iyer N. Subramanian
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 760)

Abstract

Developing a declarative approach to schema integration in the context of heterogeneous database systems is a major goal of this research. We take a first step toward this goal in this paper, by developing a simple logic called SchemaLog which is syntactically higher-order but has a first-order semantics. SchemaLog can provide for a logical integration of multiple relational databases in a federation of database systems. We develop a fixpoint theory as well as a sound and complete proof theory for the definite clause fragment of SchemaLog and show their equivalence to the model-theoretic semantics. We argue that a uniform framework for schema integration as well as schema evolution is both desirable and possible. We illustrate the simplicity and power of SchemaLog with a variety of applications involving database programming (with schema browsing), schema integration, schema evolution, and cooperative query answering.

Keywords

Schema Integration Logic Programming Common Data Model Definite Clause Definite Program 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Laks V. S. Lakshmanan
    • 1
  • Fereidoon Sadri
    • 1
  • Iyer N. Subramanian
    • 1
  1. 1.Department of Computer ScienceConcordia UniversityMontreal

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