This guide describes to be used for official production releases of This format is not mandated for internal terminology development usage or as an interchange mechanism between terminology development systems. provides a format that is flexible, unambiguous and useful. It was designed to strengthen by providing a simple and stable format that enables innovation through adaptations to cater for changing requirements

This specification was developed by harmonizing proposals reviewed by IHTSDO Enhanced Release Format Project Group, including:
  • Enhanced Release Format Specification (SNOMED International Proposed Specification , 21 June 2007);
  • Reference Set Specification (SNOMED International Proposed Specification , 31 July 2007);
  • Alternate Release Format (proposed by NEHTA and their Australian Affiliates).

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The component release files are defined in the following sections: