description: This extension links this observation with the certified reference material used for the calibration.\nThe certified reference material is identified by using an Identifier.\nThis extension should be used when the unit is UCUM [IU].
package_name: hl7.fhir.uv.lab-report.r4b
derivation: constraint
name: ObservationCertifiedRefMaterialIdentifer
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/lab-report/StructureDefinition/observation-certifiedRefMaterialIdentifer'}
    index: 1
  value:
    choices: [valueIdentifier]
    index: 3
  valueIdentifier: {type: Identifier, choiceOf: value, index: 4}
package_version: 1.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/lab-report/StructureDefinition/observation-certifiedRefMaterialIdentifer
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 1.0.0-ballot