Page History
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Transitive Closure Files are not distributed in the SNOMED CT International Release |
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A Transitive Closure History file can be generated from the SNOMED CT content using scripts provided with each release. The generated file will be of the following format and contain the valid states of the transitive closure of each concept across all previous releases:
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Field
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Data type
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Purpose
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subtypeId
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Id of the concept playing the subtype role. Set to an Identifier of a concept .
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supertypeId
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Id of the concept playing the supertype role. Set to an Identifier of a concept .
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Specifies the inclusive date at which the transitive closure record became valid.
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Specifies whether the Identifier version's state was active or inactive from the point in time specified by the effectiveTime .
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transitive closure table is one of the most efficient ways to test for subsumption between concepts.
Snapshot Transitive Closure File
SNOMED International provides an example of a Transitive Closure Perl script file (click to download) that can be used to generating a snapshot view of the transitive closure from the snapshot release of the
. The output of this script conforms to the following following file structure. Note that the primary key for this table consists of both columns.Specref RefType file t Relationship
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Transitive Closure File - Detailed Specification |
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Versioned Transitive Closure
A versioned view of the
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Versioned Transitive Closure File - Example Specification |
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Related Links
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Related Links
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