description: If the value is not a proper value, indicates the reason.
package_name: rs/hl7.fhir.core
derivation: constraint
name: nullFlavor
type: Extension
elements:
  extension: {index: 0}
  url:
    type: uri
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor'}
    index: 1
  valueCode:
    type: code
    binding: {strength: required, valueSet: 'http://terminology.hl7.org/ValueSet/v3-NullFlavor', bindingName: NullFlavor}
    index: 2
package_version: 3.5.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null