HL7 v2 parser Glossary

Table 0301 - Universal ID type

13 coded values.

CodeMeaning
DNSAn Internet dotted name. Either in ASCII or as integers
GUIDSame as UUID.
HCDThe CEN Healthcare Coding Scheme Designator. (Identifiers used in DICOM follow this assignment scheme.)
HL7Reserved for future HL7 registration schemes
ISOAn International Standards Organization Object Identifier
LReserved for locally defined coding schemes.
MReserved for locally defined coding schemes.
NReserved for locally defined coding schemes.
RandomUsually a base64 encoded string of random bits.<p>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 constr
URIUniform Resource Identifier
UUIDThe DCE Universal Unique Identifier
x400An X.400 MHS format identifier
x500An X.500 directory name