Knowledge bases constitute the core of those Artificial Intelligenceprograms which have come to be known as Expert Systems. Anexamination of the most dominant knowledge representation schemes usedin these systems reveals that a knowledge base can, and possiblyshould, be described at several...

Current planning and control procedures for large-scale software projects are not sufficientlyequipped to deal with changing or imprecise requirements, resource breakdowns,unexpected delays, etc. We propose a solution for managing change inprojects, based on a semantic model of the software...