Associations between Component Files

The logical model of

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between the components in the release files are depicted in the following diagramis shown in  . The component class represents columns present in all three component files. The individual classes (description, concept and relationship) only show the additional columns present in those files. The colored lines between descriptions and concepts and between relationships and concepts represent the link between the foreign keys (shown in bold) and the id of the concept. These provide the functional connections between components described in this document. The grey lines indicate additional links between columns that are populated with concept identifiers that provide enumerated values.

A More Complete View of Release File Associations

 provides an extended view of the associations between release files following changes complete in July 2019 release of SNOMED CT. These changes enable SNOMED CT to use enhanced 

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 features and resulted in a significant change to the way in which the 

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 of 

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 are represented. However the changes but did not significantly affect the structure and associations between the main component files shown in  

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Detailed Notes of Release File Associations

Each

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is represented by a row in the

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 and the concept is identified by the id column in that row. There can be more than one row with the same id but with different effectiveTime values, in which case each of these rows represents a version of that same concept. Thus each row represents a version of a clinical

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