A formal view integration method

  • Authors:
  • Joachim Biskup;Bernhard Convent

  • Affiliations:
  • Universitat Dortmund, Informatik VI, Postfach 500 500, 4600 Dortmund 50, Federal Republic of Germany;Universitat Dortmund, Informatik VI, Postfach 500 500, 4600 Dortmund 50, Federal Republic of Germany

  • Venue:
  • SIGMOD '86 Proceedings of the 1986 ACM SIGMOD international conference on Management of data
  • Year:
  • 1986

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Abstract

The design of an appropriate conceptual database scheme is one of the most difficult tasks in usual database applications. Especially, the design of a common global database scheme for many different user groups requires a great amount of effort and skill, because the desired scheme should fit a great variety of requirements and expectations. Here, view integration is a natural method that should help to manage the complexity of such a design problem. For each user group the requirements and expectations are separately collected and specified as views, that are subsequently integrated into a global scheme supporting all those different views.In this paper, we carefully develop a formal model, clarifying many notions and concepts, related to the view integration method. This formal model serves as a theoretical basis of our integration approach that uses equivalence preserving, local scheme transformations as the main integration operations.