As part of the operation of an Expert System, adeductive component accesses a database of facts to helpsimulate the behavior of a human expert in a particularproblem domain. The nature of this access is examined, andfour access strategies are identified. Features of each ofthese strategies are...

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...

Most large systems development efforts proceed in a top-down fashion where initialspecifications and requirements are incorporated into a high-level design, followed byprograms based on this design. However, a major part of the software life-cycle effort isdevoted to maintenance. While several...