http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor|4.0.1

If the value is not a proper value, indicates the reason.

Structure JSON Dependencies FHIRSchema Other Versions Dependant (0)Elements Summary

description: If the value is not a proper value, indicates the reason.
derivation: constraint
name: nullFlavor
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor'}
    index: 1
  value:
    choices: []
    index: 3
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.1
required: [value]