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.
description: 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. derivation: constraint name: VSReference type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/valueset-reference'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/valueset-reference base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [value]