description: Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event.
package_name: hl7.fhir.core
derivation: constraint
name: certainty
type: Extension
elements:
  extension: {index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty'}
    index: 1
  valueCodeableConcept: {type: CodeableConcept, index: 2}
package_version: 3.2.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null