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Most extensions include additional concepts, descriptions and/or relationships. It is therefore important for extension producers to understand the logical design of these components, and any extension-specific rule related to these components.

The following subsections present logical design rules and considerations for components in an extension:

For information about the process of authoring extension components, please refer to 5.4 Authoring. For a full list of RF2 component tables and their attributes, please refer to the SNOMED CT Release File Specifications

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