the part of an expert system that includes facts based on information gathered from experts, as well as rules that indicate procedures to follow in using the facts.
The knowledge, which may include assertion, rules, objects and constraints, used by a knowledge-based or expert system. Its organization is based on knowledge representations. The developer or user of the system may be unaware of the underlying knowledge representations, seeing only the domain knowledge representations.
The foundation of a knowledge-based system that contains facts, rules, inferences, and procedures.