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The antecedent version of SNOMED that immediately preceded the release of SNOMED Clinical Terms.


  • None of the earlier versions of SNOMED are maintained.
    Since 2017 all antecedent versions are formally deprecated and are no longer licensed for use.

  • In SNOMED RT, RT refers to reference terminology.
  • SNOMED RT was a source terminology, with CTV3, from which SNOMED CT was developed.


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