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tSNOMED Clinical Terms
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tComponents
are identified and referenced using numeric identifiers. These identifiers have the data type
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RefType(data type)
tSCTID
 
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t(SNOMED CT Identifier).

The

Specref
RefType(data type)
tSCTID
 data type is 64-bit integer which is allocated and represented in accordance with a set of rules. These rules enable each 
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tSCTID
to refer unambiguously to a unique component. They also support separate partitions for allocation of
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tIdentifiers
for particular types of component. In the case of
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tcomponents
that originate in an
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tExtension,
the
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tSCTID
also supports separate
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tnamespaces
that distinguish between different issuing organizations.

Details of the

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tSCTID
are described in the following sections:

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