Accession Number : ADA330609

Title :   Research on Cooperative Active Database System

Descriptive Note : Final rept., Sep 95-96

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF COMPUTER SCIENCE

Personal Author(s) : Chu, Wesley W.

PDF Url : ADA330609

Report Date : AUG 1997

Pagination or Media Count : 12

Abstract : Active database systems are receiving increasing interests from both research and commercial communities. However, rules are often difficult to specify and the complexity increases as the database increases in its size. To remedy this problem, we propose to use relaxation techniques for rule generation and relaxation. By using high level concepts and cooperative operators in active rules, we can not only simplify the rule specification process, we can also increase the expressiveness of active rules. High level concepts and cooperative operators used in rules are first relaxed into low level active rules by using a tree type knowledge structure called Type Abstraction Hierarchy (TAH). The relaxed rules are then classified into equivalent classes by domain experts. Rule generation and relaxation are accomplished by relaxing the attributes in the rule conditions and/or by relaxing the actions with cooperative operators. This report presents a design concept of Cooperative Active Database Systems and their future research directions.

Descriptors :   *DATA BASES, *SOFTWARE ENGINEERING, DATA MANAGEMENT, DISTRIBUTED DATA PROCESSING, KNOWLEDGE BASED SYSTEMS, OBJECT ORIENTED PROGRAMMING, FUZZY LOGIC.

Subject Categories : Computer Programming and Software
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE