Integrating rules into object-oriented programming systems

Details Integrating rules into object-oriented programming systems Integrating rules into object-oriented programming systems

1994-10-21

1998-06-16

Hafiz, Tariq R.

395 50, G06F 1518

Patent

active

057684804

ABSTRACT:
Techniques for integrating rules into imperative object-oriented languages such as C++. C++ is extended to permit definition of rules as members of classes. When a rule is defined as a member of a class, a preprocessor receives the declaration of the rule's class and of any other class involved in the rule and generates additional data members and member functions for the classes. The additional members of the classes permit a complete implementation of the rule. No additional rule interpreter or decision network is required. The rule definition defines collections of objects linked by interobject pointers to which the rule applies. A rule is evaluated only if there is a change in a value mentioned in the rule in an object belonging to a collection of objects for the rule. The rule's condition is a sequence of bindings and tests. The bindings define a path through a collections of objects to which the rule applies, and the path is followed during evaluation. The rules thus implement access-limited logic.

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J. M. Crawford and B. Kuipers, "Formalizing Access-Limited Reasoning" Principles of Semantic Networks Explorations in the Representation of Knowledge, Edited by John F. Sowa, IBS System Research, 1991.
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J. M. Crawford, B. J. Kuipers, "Algernon-A Tractable System for Knowledge-Representation", SIGART Bulletin, vol. 2, No. 3, Jun. 1991.

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