Building inheritance graphs in object database design

  • A. Yahia
  • L. Lakhal
  • R. Cicchetti
Object-Oriented Databases 1
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1134)


In this paper, object database schema design is addressed through the problem of designing the inheritance graph. We propose a method, called iO2, for building the inheritance graph of an O2 database schema. The iO2 method is based on the Galois lattice data structure. It encompasses three steps: a (first) construction step, a (second) optimization step, and a (final) generation step. This paper focuses on the two latter steps. The optimization step builds the Galois inheritance graph from the Galois graph (delivered by the construction step) of the finite binary relation associating properties to entity and relationship types. We define a new optimization algorithm which eliminates redundancies from the Galois graph. The generation step yields the O2 inheritance graph from the Galois inheritance graph.


Binary Relation Directed Acyclic Graph Database Schema Class Hierarchy Object Database 
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 1996

Authors and Affiliations

  • A. Yahia
    • 1
  • L. Lakhal
    • 1
  • R. Cicchetti
    • 2
  1. 1.Laboratoire Informatique (LIMOS)Université Blaise Pascal (Clermont-Ferrand II)Aubière CedexFrance
  2. 2.Faculté des sciences de LuminyLIM-Université d'Aix-Merseille IIMarseille Cedex 9France

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