SNOMED CT Release Format 1

The file structure previously used to distribute SNOMED CT content.

Release Format 1 was specified by SNOMED International in 2002, but was replaced by Release Format 2 in January 2012.
Release Format 2 is now the primary format for the SNOMED CT International Release.
During an overlap period until 2016, both formats were used for the SNOMED CT International Release.

Alternatives