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

112 | SNOMED CT Release Format 1 (RF1) Guide July 2012
A Subset Definition may specify the membership of a Subset.
3.2.4.2. Subset Tables - Summary
Subsets provide a way for users and implementers to limit the set of SNOMED CT Concepts and Descriptions
for a particular purpose.There are several types of subsets already defined for specific goals, and other types
will be utilized in the future.
A common file structure is used for all Subsets.This approach simplifies the release structure and installation
process for all SNOMED CT users.
Subsets are released using two tables:
Table 37: Subset Mechanism Summary
Subsets Table:
Subset Members Table:
3.2.4.2.1. Subsets Table - Summary
Each row in this table describes one release of a Subset.
This table includes SNOMED CT Subsets that are packaged together
in the Subset Members table.
Each row in this table represents one member of a Subset.
The member may be a Concept or a Description. One or more Subsets
may be packaged together in this table.
Each row in the Subsets Table describes a Subset and characteristics of that Subset.
Table 38: Subsets Table
Key Fields
SubsetId
Data Fields
SubsetOriginalId
SubsetVersion
SubsetName
SubsetType
LanguageCode
RealmId
The unique SNOMED CT Identifier for this Subset.
The unique SNOMED CT Identifier for the original Subset of which this
Subset is a version.
An integer incremented for each revised release of a Subset.
A name that describes the purpose or usage of this Subset.
Indicates the nature of the Subset and the type of SNOMED CT
Component that may be a member of the Subset.
Identifies the Language and optionally the Dialect to which the Subset
applies (only used for description -based subsets: Language, Realm
Description, and Realm Concept).
Identifies the Realm to which the Subset applies.
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