Extensions Practical Guide

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Once promoted, a new version of the component is available in the International Edition with a new EffectiveTime, an international moduleId, and the same SNOMED CT identifier as was used in the originating extension. From that point forward, SNOMED International becomes responsible for maintaining the promoted content. Future releases of the extension content alone, which are dependent on the new version of the International Edition (that contains the promoted content), must remove will no longer include the promoted content from their in their Snapshot and Delta release files.

Footnote Macro

Please note that if the extension is published as part of an Edition, in which the files include content from both the extension and International Edition, then the Snapshot and Delta release files will contain the promoted content as part of the international module.

The promoted content will, however, continue to appear in the Full release files of the extension Edition with an older EffectiveTime to reflect the ownership history of this content within the extension. Please note that the SNOMED CT identifiers of all promoted content will remain unchanged, and will therefore continue to include the namespace identifier of the originating organization.

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Warning

Some approaches to content demotion that have previously been proposed are considered to be unsafe. The content demotion approaches that should never be used include:

  • Removing every instance of the component from the International Edition (or source edition)
    • This approach will delete the history of the component for users of the International Edition, who do not use the demoted content. The history of each SNOMED CT component should be traceable in the edition in which the component was created.
  • Retaining the component active in the source module, and creating a new version of the component (i.e., with a more recent effectiveTime) in the less dependent module
    • This approach will make the component visible and accessible in the source edition, and users of the source edition would not be aware that the component was demoted to a less dependent module
    • This approach may lead to inconsistency between the version of the component in the International Edition and the version in the less dependent module. 

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