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Given the RF2's history tracking capability, it is possible to perform a number of different releases of content:

Table 2.8-1: SNOMED CT Release Types

Full

The files representing each type of component contain every version of every component ever released.

Snapshot

The files representing each type of component contain one version of every component released up to the time of the snapshot. The version of each component contained in a snapshot is the most recent version of that component at the time of the snapshot.

Delta

The files representing each type of component contain only component versions created since the previous release. Each component version in a delta release represents either a new component or a change to an existing component.

There are valid use cases for each type of Release Type. Each International release will incorporate all three of these Release Types, allowing users to choose the most appropriate format for their needs.

A full release will always be available from release centers. Optionally, other Release Formats may also be made available. Where out of cycle releases are made, these will follow the same format as standard cycle releases.


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