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Gloss
tSNOMED CT International Release
 includes three distinct 
Gloss
trelease types
Caption reference
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CapRefTypeTable
 describes the release types and the differences between them.


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CapIdreltypes
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SNOMED CT Release Types


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Release type

   Description

Full

Glossary include
Glossfull release
Suffix is
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Notetrue
Prefix A

Snapshot

Glossary include
Glosssnapshot release
Suffix is
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Exampletrue
Notetrue
Prefix A

Delta

Glossary include
Glossdelta release
Suffix is
Definline
Prefix A

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Glossary include
Glossdelta release
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There are practical use cases for each 

Gloss
PreSpacefalse
tRelease Type
.

  • The full release allows access to all versions of the release. This is valuable for reviewing data entered using earlier versions and more generally supporting change management.
  • The snapshot release only includes the latest version of each component. This can be useful to optimize access to the current version but does not provide access to earlier versions.
  • The delta release only includes changes made between one version and the next. This provides a simple way to identify new and changed components to support change management and can also be used to update the previous version of the full release to the new version of the full release. However, the delta release cannot be used as a stand alone resource.

When considering which release type to use, it is worth noting that delta and snapshot views can be readily generated from the full release type. For this reason organizations that maintain 

Gloss
tSNOMED CT extensions
 are required to provide the 
Gloss
tfull release type
, while distribution of the other release types are optional.