Structuring Knowledge in a Graph

The idea that knowledge is a commodity that can be used by machines in various ways forms the entry to our discussion of knowledge based systems. We will limit ourselves to those systems that are in an active dialogue with their human user. As a consequence, the use and structuring of knowledge in autonomous systems, like robots or visual pattern recognizers, will not be discussed. In general, knowledge-based systems cannot be considered as models of human cognition. Rather, they should provide an extension of the user’s cognitive abilities.