Knowledge representation is the study of knowledge structure and processing.

- [http://semanticweb.org/wiki/Knowledge_Representation]

Knowledge representation is the field of artificial intelligence devoted to representing information about the world in a form that a computer system can utilize to solve complex tasks such as diagnosing a medical condition or having a dialog in a natural language. Knowledge representation incorporates findings from psychology about how humans solve problems and represent knowledge in order to design formalisms that will make complex systems easier to design and build.

Adapted from: http://en.wikipedia.org/wiki/Knowledge_representation_and_reasoning#Ontology_Engineering [-]