Integration of heterogeneous object schemas

Jia Ling Koh, Arbee L.P. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)


In a heterogeneous database system which consists of object databases, a global schema created by integrating schemas of the component databases can provide a uniform interface and high level location transparency for the users to retrieve data. The main problem for constructing a global schema is to resolve conflicts among component schemas. In this paper, we define corresponding assertions for the database administrators to specify the semantic correspondences among component object schemas. Based on these assertions, integration rules are designed, which use a set of primitive integration operators to restructure the component schemas for resolving the conflicts and do the integration. The principle of our integration strategy is to keep the data of component databases retrievable from the global schema without losing information. Moreover, more informative query answers may be derived from the heterogeneous databases due to schema integration. Finally, the mapping strategy between global schema and component schemas is provided.

Original languageEnglish
Title of host publicationEntity-Relationship Approach – ER 1993 - 12th International Conference on the Entity-Relationship Approach, Proceedings
EditorsRamez A. Elmasri, Vram Kouramajian, Bernhard Thalheim
PublisherSpringer Verlag
Number of pages18
ISBN (Print)9783540582175
Publication statusPublished - 1994
Externally publishedYes
Event12th International Conference on Entity-Relationship Approach, ER 1993 - Arlington, United States
Duration: 1993 Dec 151993 Dec 17

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume823 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference12th International Conference on Entity-Relationship Approach, ER 1993
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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