FRESH: expert-system shell with foundation in data modelling
Information and Software Technology
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
Abstraction Capabilities and Invariant Properties Modelling within the Entity-Relationship Approach
Proceedings of the 1st International Conference on the Entity-Relationship Approach to Systems Analysis and Design
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The emergence of commercially available expert system shells has opened up new avenues for large scale development of expert systems. However, this challenge also generates a new problem area concerned with ways of integrating such developments with existing information modelling environments. Expert system shells and conventional systems originate from distinct research areas with mutually differing modelling-views. These differences retard the natural incorporation of the new technology in existing environments.To attack this problem, a migration path is required. The fundamentals of expert systems shells should be carefully grafted upon existing modelling views in order to bridge the gap.This contribution describes the expert system design tool FRESH (Frame Relationship Expert-system SHell) and its underlying principles. The fundamentals of FRESH closely resemble those of the Entity-Relationship (ER) approach to information modelling. Some necessary adjustments, which enable knowledge representation, fit in naturally, without having the modelling view drift away from its origin.FRESH has been implemented in APL2, exploiting the language's state of the art data structures and interactive capabilities. Also, APL2 provides excellent opportunities to interface expert system technology to traditional management information systems.