description: Allows expressing the value set that must be stored internally by the system (as distinct from the base value set which defines values for exchange). package_name: hl7.fhir.core derivation: constraint name: permitted-value-valueset type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/11179-permitted-value-valueset'} index: 1 valueReference: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/ValueSet'] index: 2 package_version: 3.2.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/11179-permitted-value-valueset base: http://hl7.org/fhir/StructureDefinition/Extension version: null