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Caption reference
CapRefIdsnomed-ct-release-types
CapRefTypeTable
 specifies the content of each of the
Gloss
Spacetrue
tRelease Format 2
Gloss
tRelease Types
.

This table is followed by illustrations of each of the

Gloss
tRelease Types
using the small same pattern of content development over seven release cycles. These illustrations highlight the key differences and the
Gloss
tRelationships
between the
Gloss
tRelease Types
.


Caption label
CapIdsnomed-ct-release-types
CapTypeTable
SNOMED CT Release Types

Gloss
tRelease Type

Gloss
tDescription

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

Gloss
tdelta release
represents either a new component or a change to an existing component.

The seven columns in each of the following illustrations represent the content of seven releases (numbered 1-7). Each

Gloss
tcomponent
is identified by a letters (A-K). A
Gloss
tcomponent
version is represented by the identifying letter followed by a number (1-7) representing the release cycle in which that
Gloss
tcomponent
version became effective.

Caption reference
CapRefIdfull-release-illustration
CapRefTypeFigure
 shows the content of a series of
Gloss
tfull releases
. The yellow background color highlights the set of
Gloss
tcomponent
versions that are also present in the snapshot for the same
Gloss
trelease version
( see
Caption reference
CapRefIdsnapshot-release-illustration
CapRefTypeFigure
).
Gloss
tcomponent
versions are shown in gray in releases versions after they have been superseded by a new
Gloss
tcomponent
version. Newly added
Gloss
tcomponent
versions, shown in red, are also present in the delta for the same
Gloss
trelease version
(see
Caption reference
CapRefIddelta-release-illustration
CapRefTypeFigure
).

The content of the

Gloss
tfull release
in any chosen version is identical to the combined content of all the
Gloss
tsnapshot releases
up to and including that version. Thus adding a
Gloss
tdelta release
to the previous version of the
Gloss
tfull release
creates the
Gloss
tfull release
for the new version. The
Gloss
tsnapshot release
is derived from the
Gloss
tfull release
by removing all except the most recent version of each
Gloss
tcomponent
.

  


Caption label
CapIdfull-release-illustration
CapTypeFigure
Full release illustration

  


Caption label
CapIddelta-release-illustration
CapTypeFigure
Delta release illustration

  


Caption label
CapIdsnapshot-release-illustration
CapTypeFigure
Snapshot release illustration


Note: In a real

Gloss
tSNOMED CT release
each of the letters A-K would be replaced by a
Gloss
tcomponent
id (a
Gloss
tSNOMED CT identifier
) and each of the release cycle numbers 1-7 would be replaced by the
Specref
RefTypefield
teffectiveTime
of a
Gloss
trelease version
.