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Terminology servers should be able to restrict searches so that they return only those Concepts and (or their associated Descriptions) that are subtype descendants of a specified Concept .

Subtype search scope restriction is particularly valuable with respect to top-level Concepts . For example, when searching for a procedure it is useful to be able to exclude disorders or findings that may contain similar words of phrases.

Generalizing subtype search scope restriction to other nodes in the subtype hierarchy may significantly enhance usability in some situations.


When undertaking an ophthalmologic examination, a search for findings could be constrained to findings related to the eye, increasing the specificity of results of searches for phrases containing the word "fundus."