http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor|5.2.0
If the value is not a proper value, indicates the reason.
| element_id | types |
|---|---|
| Extension | |
| Extension.extension | |
| Extension.url | |
| Extension.value[x] | |
| Extension | |
| Extension.id | |
| Extension.extension | |
| Extension.url | |
| Extension.value[x] |