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This section contains information relevant to all types of SNOMED CT release file. The topics covered are summarized below.covers several general topics related to SNOMED CT

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trelease packages
and
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trelease files
including:

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The following two sections provide detailed specifications of the release files.

  • Section 4 Component Release Files Specification contains details of release files that represent the main SNOMED CT components:
    • Concepts

    • Descriptions

    • Relationships
  • Section 5 Reference Set Release Files Specification 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

Info
titleHistorical Note on Current and Previous Release File Formats

The standard format in which 

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tSNOMED CT
has been distributed since 2012 is known as 
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tRelease Format 2
(RF2). It was developed in response to extensive feedback on the original release file format, now known as
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tRelease Format 1
(RF1), in which
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tSNOMED CT
was distributed between its first release in 2002 and 2012. The RF1 format is now deprecated and no longer supported.


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