description: A complex extension allowing structured capture of the exposure risk of the patient for an adverse reaction (allergy or intolerance) to the specified substance/product. package_name: hl7.fhir.r3.examples derivation: constraint name: substanceExposureRisk type: Extension elements: extension: short: Substance (or pharmaceutical product) type: Extension index: 0 slicing: slices: substance: match: {} schema: short: Substance (or pharmaceutical product) type: Extension _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: substance} index: 2 valueCodeableConcept: {type: CodeableConcept, index: 3} exposureRisk: match: {} schema: short: known-reaction-risk | no-known-reaction-risk type: Extension _required: true index: 4 extensions: {} elements: extension: {index: 5} url: type: uri pattern: {type: Uri, value: exposureRisk} index: 6 valueCodeableConcept: {type: CodeableConcept, index: 7} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/allergyintolerance-substanceExposureRisk'} index: 8 value: choices: [] index: 10 package_version: 3.0.2 extensions: substance: url: null short: Substance (or pharmaceutical product) type: Extension _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: substance} index: 2 valueCodeableConcept: {type: CodeableConcept, index: 3} exposureRisk: url: null short: known-reaction-risk | no-known-reaction-risk type: Extension _required: true index: 4 extensions: {} elements: extension: {index: 5} url: type: uri pattern: {type: Uri, value: exposureRisk} index: 6 valueCodeableConcept: {type: CodeableConcept, index: 7} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/allergyintolerance-substanceExposureRisk base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [extension]