Principles of model development: Separation of Taxonomies

GALEN aims to produce an application-independent model. It has identified two features of many existing ontologies which reduce application independence and has designed means for avoiding them which are summarised under the principle of separating taxonomies [Rector 1995; Rector 1997; Rector and Horrocks 1997]. The fundamental principle is that why something has been classified in the way it has been should always be explicit in the model. If a concept has been classified along several axes, then the information should be sufficient for an application to choose which axes are relevant to that application.

This is achieved by following two principles:

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