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The SNOMED CT Extensions Specification and Guide providing information about the way in which SNOMED CT Extensions are represented and related to the International Edition and to other extensions. It also provides guidance on development, distribution and use of extensions.
NOTE: Some aspects of the required guidance in this document are incomplete and under revision.
Latest web browsable version: http://snomed.org/esg
Directory of available documents: http://snomed.org/doc
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