Stream: implementers
Topic: organizational identifiers V2 and FHIR
Brian Reinhold (Sep 23 2019 at 15:17):
V2 Table 0301 defines several Universal Id types
Value Description
DNS An Internet dotted name. Either in ASCII or as integers
GUID Same as UUID.
HCD The CEN Healthcare Coding Scheme Designator. (Identifiers used in DICOM follow this assignment scheme.)
HL7 Reserved for future HL7 registration schemes
ISO An International Standards Organization Object Identifier
L,M,N These are reserved for locally defined coding schemes.
Random Usually a base64 encoded string of random bits. The uniqueness depends on the length of the bits. Mail systems often generate ASCII string “unique names," from a combination of random bits and system names. Obviously, such identifiers will not be constrained to the base64 character set.
URI Uniform Resource Identifier
UUID The DCE Universal Unique Identifier
When the universal id type is an ISO, in fhir it is prefixed with urn:oid:[identifier]
Are there any special prefixes for the other V2 identifier types?
Lloyd McKenzie (Sep 23 2019 at 15:43):
urn:uuid for GUID/UUID. URI needs no prefix. Not sure about the others.
Brian Reinhold (Sep 23 2019 at 15:48):
urn:uuid for GUID/UUID. URI needs no prefix. Not sure about the others.
For now I guess its best to prefix them with none. At least the DNS and URI should be the same. The HCD is a mystery.
Last updated: Apr 12 2022 at 19:14 UTC
