A key factor when deciding which which release type(s) to import is the extent to which each release by supports required views of the terminology content. 
lists the views that may be required and indicates which release types support each of these views.
Supported Views | Release Types | ||||
| Full | Snapshot | Delta | |||
Full View | A view of SNOMED CT that includes all versions of all components and reference set members in a full release. |  |  | | |
| Snapshot Views | |||||
Current Snapshot | A snapshot view for the date of the most recent release. | | | | |
| Retrospective Snapshot | A snapshot view for a specified snapshot date. | | | | |
| Delta Views | |||||
| Current Delta | A delta view for the date range between the most recent release date and the immediately preceding release date. | | | | |
| Retrospective Delta | A delta view for a specified date range. | | | | |
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