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What are the principles of a classification?

April 26, 2017Classification Principles

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What are the principles of a classification?

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• to convey the maximum information by the use of the minimum number of categories; • to provide a mutually exclusive category for each concept appropriate to the scope to the classification concerned, and; • to organise the assignment to categories in such a way that the relative importance of each is immediately apparent. By means of the use of composite categories (eg Adult ostemalacia due to malabsorbtion) the structure of the classifications like ICD encourages the maximum information to be contained in the minimum number of categories. The use of residual categories (eg Other postprocedural endocrine and metabolic disorders) maintains the scope of a classification, and the encompassed rules of precedence ensure that the main item of information is readily identifiable.