The file structure used to distribute alternative 
for 
.
Note: The Identifier file is not currently used in the 
as use of the more flexible 5.2.3.1 Simple Map from SNOMED CT Reference Set / 5.2.3.2 Simple Map to SNOMED CT Reference Set structures are preferred for links to/from alternative codes. The only known current use of this file is for internal identification of components during the content development process.
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