KEE

Knowledge Engineering Environment. Frame-based expert system.

Supports dynamic inheritance, multiple inheritance,

polymorphism. Classes, meta-classes and objects are all

treated alike. A class is an instance of a meta-class. Can

control rules for merging of each field when multiple

inheritance takes place. Methods are written in LISP.

Actions may be triggered when fields are accessed or modified.

Extensive GUI integrates with objects. Can easily make object

updates to be reflected on display or display selections to

update fields. This can in turn trigger other methods or

inference rules which may then update other parts of the

display. Intellicorp, for TI Explorer. "The Role of

Frame-Based Representation in Reasoning", R. Fikes et al, CACM

28(9):904- 920 (Sept 1985).