description: Marks that the expansion is incomplete, and values other than those listed may be valid. This may be used because post-coordinated codes are allowed, and no practical expansion can be produced. package_name: hl7.fhir.r5.core derivation: constraint name: unclosed type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/valueset-unclosed'} index: 1 value: choices: [valueBoolean] index: 3 valueBoolean: {type: boolean, choiceOf: value, index: 4} package_version: 4.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/valueset-unclosed base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.5.0 required: [value, valueBoolean]