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The file structure specified by the SNOMED International for the files used to distribute SNOMED CT content in 2002.


This format was replace by Release Format 2 in January 2012, which is now the primary format for the SNOMED CT International Release. For backward compatibility Release Format 1 files can be generated using a conversion utility and continue to be distributed available during an interim transitional period.


  • RF1
  • SNOMED CT Release Format 1