oryan@dip.eecs.umich.edu (Cahan O'Ryan) (02/17/91)
There is another expert system shell accessible from Smalltalk. This is NEXPERT OBJECT from Neuron Data. This is an object-oriented expert system shell written in C. There is an excellent development environment (separate from Smalltalk that includes rule and object browsers, etc.). The knowledge bases created can then be run with a variety of front-end interfaces available, including Smalltalk. The Smalltalk bridge is a separate product from: Arbor Intelligent Systems, Inc. 506 N. State St. Ann Arbor, MI 48104 (313) 996-4238. I happen to work for Arbor and am the author of the Smalltalk bridge to NEXPERT. It is currently available for Objectworks\Smalltalk. NEXPERT is both forward and backward chaining, and in general is very full-featured, but is not cheap.