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Blog from December, 2023

Dear all,

After discussions with the community, SNOMED International is proposing to change the coverage of language in the Annotations refsets in the following way:

  • The langueCode field was specified as the two characters of ISO-639-1 code for the language of the annotation text. The change is to include support for specifying dialect when it is applicable by adhering to RFC 5646, which allows the combination of two characters of ISO 639-1 code and two uppercase letters of country code (ISO 3166) separated by a hyphen. 
  • The "languageCode" will be changed to "languageDialectCode" in the field column.
  • A new metadata concept "Language dialect", a subconcept of "Language Code", will be used for the metadata of this column in the descriptor refset.
  • The changes will apply to both the Member Annotation String Value reference set + Component Annotation String Value reference set

Please provide any feedback by Friday 26th January 2024 at the absolute latest, as lack of response will be taken as implicit acceptance, and the changes will proceed as planned.

If you have any concerns or questions on these proposed changes, please email us on  

Kind regards, 

Andrew Atkinson  |  Release Manager 

Dear all,

The Production release of the December 2023 SNOMED CT® International Edition is now available to all users, from the MLDS distribution site.

All files distributed for the December 2023 International Edition are available from the “December 2023 v1.0" version in the "SNOMED CT International Edition" project, which can be found on the "SNOMED Releases" page in MLDS, accessed here:

The SNOMED CT International Edition contains SNOMED CT files in Release Format 2 (RF2) only, distributed in a zipped file archive:


The Release Notes ("doc_SnomedCTReleaseNotes_Current-en-US_INT_20231201.pdf") can be downloaded as distinct files from the same MLDS release version, or accessed online:

Those Members using MLDS as their distribution site will find that their affiliates have access to the new release automatically.

All vendors and affiliates should please contact their National Release Centre (NRC) for information on when the latest release package will be available for download from the NRC website. Contact details for all NRC's can be found here -

Please refresh your memory of all major changes to this upcoming release, as published on the Early Visibility page here:, and in the Release Notes (where changes to the final Production package made throughout the Release cycle are logged).  

NOTE:  SNOMED International have now transitioned the International Monthly release date to the first of each month, along with all of the associated documentation.  This December 2023 International Edition therefore has an effectiveTime of 20231201.  All subsequent International Releases will be published on the first of each month, and so the next International Edition Release will take place on 1st January 2024.

If you have any questions about the December 2023 International Edition release, or have difficulties downloading the files from the distribution site, please contact SNOMED International at with “December 2023 International Edition release question" in the subject line.

Kind regards, 

Andrew Atkinson  |  Release Manager