Sanctioned specialisation is a mechanism for extending the content of a controlled terminology system by combining existing components of the system using specific mechanisms also defined in the system.
An example: pneumonia can be described as a special type of inflammation:
Inflammation which has_location Lungand this can be further specialised into pneumococcal pneumonia (caused by pneumococcus)
Inflammation which has_location Lung is_caused_by PneumococcusSanctioned specialisation is used in description logic systems such as SNOMED CT. The concept is defined in a broader context and more examples given in ISO 17115, an ISO standard.
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