http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor|4.0.1
If the value is not a proper value, indicates the reason.
| type | destination |
|---|---|
| baseDefinition | http://hl7.org/fhir/StructureDefinition/Extension |
| type | http://hl7.org/fhir/StructureDefinition/Extension |
| Extension.value[x].type | http://hl7.org/fhir/StructureDefinition/code |
| Extension.value[x].binding.valueSet | http://terminology.hl7.org/ValueSet/v3-NullFlavor | 4.0.1 |