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.

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