The ability to tailor SNOMED CT to support specific use cases speaks to the adaptability of SNOMED CT, and any customization artifact that is beneficial to share may be useful to include in an extension. NRCs may need to configure SNOMED CT to match national requirements for reporting, analytics, language preferences etc.. Hence, following SNOMED CT derivatives may be included in an extension to meet a range of SNOMED CT use cases:
- A subset of SNOMED CT concepts or descriptions for use in a clinical speciality or practice
- Groups of concepts to support national reporting and analytics
- Prioritized components to support the logical display of search results
- Sets of components annotated with indicators that may trigger various guidelines or features
- Associations between SNOMED CT concepts, for example to represent language preferences or represent reasons for inactivation
In many cases, the terminology will be customized by referencing existing SNOMED CT components and linking these to additional information. The SNOMED CTreference setstructure provides a standard representation for customized sets of SNOMED CT components. Different reference set types have been specified to meet particular needs and data structure requirements. All reference sets belong to a particular SNOMED CT Edition, and reference sets developed by Member countries or local organizations are included in their national or local extension.
Key Steps
In section 5 Key Steps we explain the full set of steps for producing any extension. However, not all of these steps are required for all purposes. If producing an extension for the purpose configuring SNOMED CT for a specific use case, the following key steps are of particular relevance:
- Create the reference set
- Principle and process for creating a reference set in an extension: 5.4.4.1 Create a New Reference Set in an Extension
- See the Practical Guide to Reference Sets for more information about the different reference set types and their usage
- Creating reference set members to represent each map record
- Principle and process for creating the individual reference set members: 5.4.5.1 Add Members to a Reference Set
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