MAPPING MEDICAL KNOWLEDGE INTO CONCEPTUAL STRUCTURES.
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abstract
CSRL (Conceptual Structures Representation Language) is a language for implementing the classification portion of an expert diagnostic system. The authors' approach to classification calls for a problem solving structure that is organized as a classification hierarchy (e. g. , a classification of diseases). Each hypothesis in the hierarchy is associated with a 'specialist' which performs the decision-making activity for the hypothesis. A top-down strategy called establish-refine is used in which either a specialist establishes and then refines itself, or the specialist rejects itself, pruning all the specialists below it. CSRL is a language for representing the specialists of a hierarchy, and the knowledge embedded within them. A discussion is presented of how medical knowledge should be applied to the two critical design problems of CSRL: forming a hierarchy which is compatible with the establish-refine strategy, and implementing specialists that accurately evaluate the plausibility of their corresponding hypothesis.
