description: Marks that the expansion is incomplete, abd other values that those listed may be valid. package_name: hl7.fhir.core derivation: constraint name: The expansion is incomplete type: null elements: extension: {name: extension, index: 0} url: type: uri 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: 1.4.0 extensions: {} class: datatype kind: datatype url: http://hl7.org/fhir/StructureDefinition/valueset-unclosed base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [value, valueBoolean]