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A uniquely identifiable set of valid concept representations, where any concept representation can be tested to determine whether or not it is a member of the value set.


  1. This definition is used in HL7 Vocabulary Committee documents and FHIR specifications.

  2. The role of a value set is to constrain the permissible content for a particular use (e.g. data entry into a particular field).

  3. In SNOMED CT a concept representation may be a concept identifier or a SNOMED CT expression

  4. A reference set can be used to represent a value set of SNOMED CT concepts each of which is represented by a concept identifier in the referencedComponentId field.

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