A key feature of
SNOMED CT Release Format 2 is that it allows a single database table to represent the
full view of a
SNOMED CT component . This view includes all versions of the
component from its first release up to its state in the latest release. This offers several
significant benefits which are described elsewhere in the guide.
Most frequently used
SNOMED CT functions need to provide access to a 'snapshot' view of the content of
SNOMED CT at a point in time.
Everyday use of
SNOMED CT for data entry and retrieval will generally require a current 'snapshot' view.
Example: To see the active content of
SNOMED CT including all the most up to date
components and excluding any
components that have been marked as inactive.
- There are some situations in which a retrospective 'snapshot' view of the data at
a selected point in the past is required.
To see the definition of a
concept as it was when a record entry was created.
To see the version of the
International Release on which the latest available version of an
Extension was based.