Knowledge representation (see KNOWLEDGE REPRESENTATION, PSYCHOLOGY of; Representation, Philosophical Issues About) is a subarea of Artificial Intelligence (see Artificial Intelligence, Philosophy of) concerned with understanding, designing, and implementing ways of representing information in computers so that programs can use this information
• to derive information that is implied by it,
• to converse with people in natural languages,
• to plan future activities,
• to solve problems in areas that normally require human expertise.