...

• Each row in a delta release file represents either a new 

  Gloss
  PreSpace false t component

   or

  Gloss
  PreSpace false t reference set member

  , or a change to an existing component or reference set member since the previous release date.
• A delta release identifies differences between two versions of the same 

  Gloss
  PreSpace false t release package

  . 
• A delta release added to the previous 

  Gloss
  PreSpace false t full release

   is identical to the 

  Gloss
  PreSpace false t full release

   of the new version.
• The previous release date, on which a delta release is based, is usually the date of the most recent previous release. However, that may not always be the case. For example, where interim releases are made between two major releases there may be a combined delta release covering a period since a previous major release. 

Please note : 

• Delta files have been removed from the SNOMED International release package, but a Delta Generation Tool is available for those who need it. The Delta Generation Tool allows users to create their own Delta between two fixed release dates - you can find it here: https://github.com/IHTSDO/delta-generator-tool/releases.

Related Links

• Glossary

  • Gloss
    t release types

    • delta release

    • Gloss
      PreSpace false t full release

    • Gloss
      t snapshot release

  • Gloss
    PreSpace false t versioned views

    • Gloss
      PreSpace false t delta view

    • Gloss
      t full view

    • Gloss
      PreSpace false t snapshot view

• Release File Specification
  • 3.2 Release Types