description: This cross-version extension represents AdverseEvent.preventiveAction from http://hl7.org/fhir/StructureDefinition/AdverseEvent|5.0.0 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r5.r4b derivation: constraint name: Ext_R5_AdverseEvent_preventiveAction type: Extension elements: extension: base: {max: '*', min: 0, path: Extension.extension} array: true min: 1 index: 0 slicing: rules: closed ordered: false discriminator: - {path: url, type: value} min: 1 slices: item[x]: match: {url: 'item[x]'} schema: short: Action that contributed to avoiding the adverse event _required: true base: {max: '*', min: 0, path: Extension.extension} index: 1 elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'item[x]'} index: 2 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Action that contributed to avoiding the adverse event choices: [valueReference, valueCodeableConcept] index: 4 valueReference: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Reference short: Action that contributed to avoiding the adverse event choiceOf: value index: 5 valueCodeableConcept: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: CodeableConcept short: Action that contributed to avoiding the adverse event choiceOf: value index: 6 required: [url] url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-AdverseEvent.preventiveAction'} index: 7 package_version: 0.0.1-snapshot-2 extensions: item[x]: url: item[x] short: Action that contributed to avoiding the adverse event _required: true base: {max: '*', min: 0, path: Extension.extension} index: 1 elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'item[x]'} index: 2 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Action that contributed to avoiding the adverse event choices: [valueReference, valueCodeableConcept] index: 4 valueReference: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Reference short: Action that contributed to avoiding the adverse event choiceOf: value index: 5 valueCodeableConcept: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: CodeableConcept short: Action that contributed to avoiding the adverse event choiceOf: value index: 6 required: [url] class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-AdverseEvent.preventiveAction base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url, extension]