A fuzzy expert database system

K.S. LEUNG, Ming Hung WONG, W. LAM

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17 Citations (Scopus)


Fuzzy concepts always exist in much of human reasoning as well as decision making. This paper presents a fuzzy expert database system which is an integration of a fuzzy expert system building tool called SYSTEM Z-II and a database management system called Rdb/VMS. This system is able to extract fuzzy data and terms stored in a database and used in the fuzzy reasoning in an expert system. It can also retrieve information by fuzzy database-queries which are generated by the expert system automatically. Many expert systems in different domain areas such as decision making can be constructed. Sample applications are described to demonstrate the flexibility and power of this system. The fuzzy query language defined and used in the system can also be used independently as a fuzzy enquiry tool in database applications. Copyright © 1989 Published by Elsevier B.V.
Original languageEnglish
Pages (from-to)287-304
JournalData & Knowledge Engineering
Issue number4
Publication statusPublished - Dec 1989


Leung, K. S., Wong, M. H., & Lam, W. (1989). A fuzzy expert database system. Data & Knowledge Engineering, 4(4), 287-304. doi: 10.1016/0169-023X(89)90027-X


  • Fuzzy query
  • Approximate reasoning
  • Fuzzy expert database system


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