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Relationship Abstractions for an Effective Hypertext Design: Augmentation and Globalization

  • Yoshinori Hara
  • Arthur M. Keller
  • Gio Wiederhold
Conference paper

Abstract

Data abstractions, i.e., aggregation and generalization, are useful for representing complex objects effectively. They provide high level semantic constraints as well as extend the capabilities of entity description in the E-R model. However, corresponding concepts of relationship abstraction are not directly available, particularly in hypertext systems.

We propose two types of relationship abstractions, augmentation and globalization, aiming at the improvement of relationship design phases. The former is an abstraction which turns information held in relationships into that of attributes for existing entities. The latter is an abstraction which generates global-to-local relationship hierarchies. We show the advantages of these abstractions.

Keywords

Relationship Relation Entity Relation Entity Attribute Link Design Generalization Hierarchy 
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 Wien 1991

Authors and Affiliations

  • Yoshinori Hara
    • 1
  • Arthur M. Keller
    • 2
  • Gio Wiederhold
    • 3
  1. 1.NEC Corporation. Department of Computer ScienceStanford UniversityStanfordUSA
  2. 2.Advanced Decision Systems. Department of Computer ScienceStanford UniversityStanfordUSA
  3. 3.Department of Computer ScienceStanford UniversityStanfordUSA

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