NamingSystemIdentifierType
Identifies the style of unique identifier used to identify a namespace.
This code system http://hl7.org/fhir/namingsystem-identifier-type defines the following codes:
| Code | Display | Definition |
| oid | OID | An ISO object identifier; e.g. 1.2.3.4.5. |
| uuid | UUID | A universally unique identifier of the form a5afddf4-e880-459b-876e-e4591b0acc11. |
| uri | URI | A uniform resource identifier (ideally a URL - uniform resource locator); e.g. http://unitsofmeasure.org. |
| other | Other | Some other type of unique identifier; e.g. HL7-assigned reserved string such as LN for LOINC. |