Preparation
Prior to creating the components or reference sets in an extension, some preliminary steps must be completed. These tasks include:
Obtaining a namespace identifier from SNOMED International
A namespace identifier is required to generate component identifiers (SCTIDs)
Acquiring the appropriate tools to support the creation, management, and distrbution of the extension
Which tools, functionalities and services are required will depend on the content of the extension
For more information please refer to Tooling Requirements
Note that these tools will be used to complete the steps listed below
Creating module(s)
At least one module concept is required
Components and reference sets which belong to the extension are assigned to the approriate module
Specifying module dependencies
These dependencies are specified using the Module Dependency Reference Set
This informs the consumers of the extension as to which additional modules are required to use/process the content of the extension
Note that some of these modules will come from other editions (such as the International Edition) and possibly, other extensions
The diagram below illustrates these key steps during the initial stage of extension creation.
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