SNOMED CT® Release Format 1 (RF1) Guide - ihtsdo

PartitionId
05
Description
A Cross Map Target
Identifiers of components that originated in an Extension have one of the following partition identifier values:
Table 16: partition identifier Values for Long Format SCTIDs
PartitionId
10
11
12
Description
A Concept
A Description
A Relationship
The values below are only valid in Release Format 1 they are not used in RF2.
13
14
15
A Subset
A Cross Map Set
A Cross Map Target
All other partition-identifier values are reserved for future use.
2.3.2.6. Namespace-Identifier
If the partition-identifier indicates a long format SCTID, the seven-digits immediately to the left of the
partition-digit are a namespace-identifier. The namespace-identifier is an integer value, left padded with ‘0’s
as necessary to ensure there are always seven digits in the value. The namespace-identifier does not hold
meaning.
Each organization that is authorized to generate SCTIDs is allocated a namespace-identifier by the IHTSDO.
Each allocated namespace is represented in the Namespace Concept metadata sub-hierarchy, released as
part of the International release (see details in The Namespace hierarchy (2.3.2.9)).
2.3.2.7. Item Identifier digits
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The string of digits to the left of the partition-identifier (in a short format SCTID) or to the left of the
namespace-identifier (in a long format SCTID) is referred to as the item-Identifier. These values are available
to uniquely identify an individual entity within the specified partition or namespace. The same item-Identifier
can be allocated in each partition of each namespace as the SCTID is rendered unique by the partition-identifier
and the namespace-identifier.
For components in the International Release of SNOMED CT, item-Identifiers will usually be issued in the
arbitrary order in which components are added to SNOMED Clinical Terms. However, due to management
of the editing process the sequence of issued item-Identifiers may be discontinuous.
Caution: In all cases, the value of item-Identifier on its is meaningless. The only way to determine the
meaning of an SCTID is by looking up the complete value in an appropriate distribution file.
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