Consistent data operations for multi-databases in extended possibility-based data models

Authors:
Julie Yu-Chih Liu;Pei-Chann Chang;Clark P. C. Yeh
Affiliations:
Department of Information Management, Yuan Ze University, Chung-Li 320, Taiwan;Department of Information Management, Yuan Ze University, Chung-Li 320, Taiwan;Department of Information Management, Shih Hsin University, Taipei, Taiwan
Venue:
Expert Systems with Applications: An International Journal
Year:
2009

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Abstract

This paper considers the data operation for multi-databases in an extended possibility-based data model. Owing to the complexity of the data model considered, inconsistent redundancy of tuples may occur when database relations being operated are associated with different resemblance relations on a given domain. This work first demonstrates the inconsistency problem, and then presents the notions of consistency constraints for multi-database design. Under the constraints, the extended possibility-based databases using different resemblance relations can preserve consistent redundancy.