| Summary: | 碩士 === 淡江大學 === 資訊管理研究所 === 82 === Because of the knowledge-intensive nature of expert systems
applicable to the real world, developing a successful expert
system has never been easy. However, few aids have been
provided by the expert system tools or shells for assisting the
process of actual constructing in a global sense. Most of the
functions are concentrated on the low-level details such as the
editing of rules and the representation of rule hierarchy and
their connections. A high-level representation of system
structure capable of showing the execution details is a
valuable reference before the actual implementation start.
Petri nets are powerful and effective formalism that can be
used to describe and design various systems. They contain
important features such as providing visualization by modeling
a system graphically, determining and verifying the dynamic
behavior, and revealing the informations of conflict occurence.
By taking advantage of these powerful natures, it is reasonable
to expect Petri nets to be a good modeling tool for expert
systems. The main objective of this paper is to discuss the
possibility of using modified Petri nets for knowledge
engineers to communicate with domain experts more easily and
effectively. An analysis of this approach has been provided.
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