The logical design of a SNOMED CT extension is technically consistent with that of the International Edition. Both represent and version SNOMED CT components and reference sets in release files that conform to theRelease Format 2 specification. This makes it easier for consumers of the International Edition to implement extensions. illustrates the logical design of a typical SNOMED CT local edition and its relationship to the associated local extension, National Edition and International Edition.
The following subsections explain this logical design in more detail:
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