http://hl7.org/fhir/StructureDefinition/valueset-reference|5.2.0

A logical reference (e.g. a reference to ValueSet.url) that identifies the value set/version that identifies the set of possible coded values this coding was chosen from or constrained by.
Base: http://hl7.org/fhir/StructureDefinition/Extension4.0.1, 5.0.0, 4.0.1
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 0
Elements