Prof. LEUNG Kwong SakChinese, M.H. WongM.H. WongChinese2023-03-312023-03-311990Computer, 1990, vol. 23 (3), pp. 38 - 470018-9162http://hdl.handle.net/20.500.11861/7716An architecture for an expert-system shell that mixes declarative nd procedural knowledge, overcoming a major problem of conventional shells, is presented. The prototype shell uses structured knowledge representations and its built-in database interface not only allows automatic extraction of data from a database management system but also provides a fuzzy database query facility. The shell's object-oriented approach to knowledge representation supports data and knowledge acquisition and management. Another feature is encapsulation which prevents object manipulation except by defined operations. A comparison of representation methods and two case studies showing System X-I's power and flexibility are included.enPeer Reviewed Journal Article10.1109/2.50271