knowledge representation
     
        The subfield of artificial intelligence concerned with
        designing and using systems for storing knowledge - facts
        and rules about some subject.
     
        A body of formally represented knowledge is based on a
        conceptualisation - an abstract view of the world that we
        wish to represent.  In order to manipulate this knowledge we
        must specify how the abstract conceptualisation is represented
        as a concrete data structure.  An ontology is an explicit
        specification of a conceptualisation.
     
        (1994-10-19)