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CoBase: A cooperative query answering facility for database systems

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Database and Expert Systems Applications (DEXA 1993)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 720))

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Abstract

A new generation of database that integrates knowledge base technology with database systems is presented for providing cooperative (approximate and conceptual) query answering. Based on the database schema and application characteristics, data are organized into type abstraction hierarchies. The higher levels of the hierarchy provide a more abstract data representation than the lower levels. Generalization (moving up in the hierarchy), specialization (moving down in the hierarchy) and association (moving between hierarchies) are the three key operations in deriving cooperative query answers. A relaxation manager is included to provide control for query relaxations. An Explanation System is also included to describe the relaxation process and provide the nearness of the approximate answer. We have demonstrated the feasibility and functionality of CoBase on top of a transportation relational database. The CoBase methodology has also been adopted in the knowledge based multimedia medical distributed database project [5] at UCLA.

This research is supported by DARPA contract N00174-91-C-0107.

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Author information

Authors and Affiliations

  1. Department of Computer Science, University of California, 90024, Los Angeles, CA

    Wesley W. Chu

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  1. Wesley W. Chu
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Editor information

Vladimír Mařík Jiří Lažanský Roland R. Wagner

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© 1993 Springer-Verlag Berlin Heidelberg

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Chu, W.W. (1993). CoBase: A cooperative query answering facility for database systems. In: Mařík, V., Lažanský, J., Wagner, R.R. (eds) Database and Expert Systems Applications. DEXA 1993. Lecture Notes in Computer Science, vol 720. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-57234-1_12

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  • DOI: https://doi.org/10.1007/3-540-57234-1_12

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-57234-3

  • Online ISBN: 978-3-540-47982-6

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