Abstract
In simple rule systems the actual “knowledge” resides exclusively in the rules, whereas the data base is an unstructured, passive set of facts. This chapter deals with formalisms by means of which a set of facts can be better structured, economically stored and furnished with “basic knowledge” about their application. A first step in structuring is to collect together all propositions concerning a particular object in a data structure like the records in PASCAL, property lists in LISP or relations in a data base (see Fig. 6.1). The basic ideas of object-oriented (frame-based) knowledge representation are inheritance hierarchies, attached procedures and default values, which are explained briefly below.
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© 1993 Springer-Verlag Berlin Heidelberg
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Puppe, F. (1993). Objects/Frames. In: Systematic Introduction to Expert Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77971-8_6
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DOI: https://doi.org/10.1007/978-3-642-77971-8_6
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