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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 

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