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This section covers several general topics related to SNOMED CT
and including:...
The next following two sections provide the detailed specifications of the release files:.3.
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- contains details of release files that represent the main SNOMED CT components:
Concepts
Descriptions
- Relationships
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- contains details of release files that customize and enhance SNOMED CT by representing:
- Subsets of concepts and descriptions
- Maps to other code systems
- Language and dialect preferences for different terms
- Annotation of components
- Associations between components
- Other forms of configuration and extensibility
The DOCTSG is a separate document that includes guidance on Representing Terminology Data and Importing SNOMED CT Release Files.
| Info |
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| title | Historical Note on Current and Previous Release File Formats |
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The standard format in which | Gloss |
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| SpacePreSpace | truefalse |
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| t | SNOMED CT |
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has been distributed since 2012 is known as | Gloss |
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| PreSpace | false |
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| t | Release Format 2 |
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(RF2). It was developed in response to extensive feedback on the original release file format, now known as | Gloss |
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| PreSpace | false |
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| t | Release Format 1 |
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(RF1), in which | Gloss |
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| SpacePreSpace | truefalse |
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| t | SNOMED CT |
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was distributed between its first release in 2002 and 2012. The SNOMED CT International Edition is no longer distributed in RF1. However, a conversion tool to general RF1 style files from the RF2 release files was made available during a transition period.The key enhancements in were:- More robust and consistent version representation;
- Inclusion of a moduleId and module dependency mechanism, which together enable modularization of releases while representing dependencies between modules;
- to provide an extensible and versionable way to configure Including support for subsets, maps, annotations, alternative hierarchies, etc.;
Use of an added to represent metadata about the structure of itself.
In common with the earlier release format specifies files that: - Represent the components of (concepts, descriptions and relationships)
Provide standard representations for subsets, language preferences and maps to other codes and classifications. Are distributed as tab-delimited text files - which represent character content in accordance with the Unicode UTF-8 specification;Use | Gloss |
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| Space | true |
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| t | SNOMED CT Identifiers |
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as the permanent of released core components;Support to the | Gloss |
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| Space | true |
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| t | International Release |
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using allocated to licensees to denote the provenance of added components and to ensure uniqueness.RF1 format is now deprecated and no longer supported. |