Current Version - Under Revision
This part of the guide addresses requirements that arise from changes to the content, structure and use of the terminology.
The first significant change management challenge relates to migration from other coding schemes or from a less structured electronic record system. Decisions must be made about retaining or converting records, queries and protocols originally created using a terminology other than SNOMED CT .
Each release of SNOMED CT introduces some changes to content. Many of these changes are additions to breadth and depth of coverage. There may also be corrections to concept definitions and enhance the expressivity of the Concept Model .
Occasionally there may also be additional technical artifacts or specifications developed to meet emerging requirements.
As systems evolve and as the content and structure of SNOMED CT are enhanced there is a continuing requirement to manage changes smoothly and without loss of information or functionality.