SNOMED Clinical Terms Componentsare identified and referenced using numeric identifiers. These identifiers have the data type SCTID (SNOMED CT Identifier).
The SCTID data type is 64-bit integer which is allocated and represented in accordance with a set of rules. These rules enable each SCTIDto refer unambiguously to a unique component. They also support separate partitions for allocation of Identifiersfor particular types of component. In the case of componentsthat originate in an Extension,the SCTIDalso supports separate namespacesthat distinguish between different issuing organizations.
Details of the SCTIDare described in the following sections:
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