description: 'R4B: `SubstanceDefinition.code.note` (new:Annotation)' package_name: hl7.fhir.uv.xver-r4b.r4 derivation: constraint name: ExtensionSubstanceDefinition_Code_Note type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-SubstanceDefinition.code.note'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Any comment can be provided in this field choices: [valueAnnotation] index: 2 valueAnnotation: short: Any comment can be provided in this field type: Annotation base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value index: 3 package_version: 0.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-SubstanceDefinition.code.note base: http://hl7.org/fhir/StructureDefinition/Extension|4.0.1 version: 0.1.0 required: [url]