PORTAL, an expert system shell
Date
1987
Authors
Gamble, Kenneth Ivan
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Abstract
PORTAL is an expert system shell developed to provide an environment that facilitates the direct use of a computer by a domain expert programming an expert system. Particular reference is made to the expert system LIVER, an expert system for the interpretation of medical laboratory tests for liver dysfunction. We discuss the knowledge representation and inference mechanism developed for this system as well as the programming tools created to facilitate the expert's direct use of the system for entering, executing and testing the knowledge base as it is being developed.