Machine Readable Concept Model

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Overview

In this chapter, we describe the logical design of the SNOMED CT MRCM.

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The figure below illustrates the major components of the MRCM described above.


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Abstract Model of the SNOMED CT MRCM

Details

The figure below illustrates the logical design of the SNOMED CT MRCM using a UML class diagram.

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Logical Model of the SNOMED CT MRCM


This UML class diagram illustrates that a SNOMED CT Edition contains a set of modules, which may each be associated with a set of MRCM domains and attribute rules.

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Each attribute rule is associated with a specific rule strength (e.g.

term
Scg expression
ShowParts
Concept
t723597001|Mandatory
concept
model
rule|
) and content type (e.g. scg-expression
Concept
t723596005|All
SNOMED
CT
content|
). An Attribute Rule may either associate an attribute with the domains to which it may be applied (i.e. an Attribute Domain Rule), or it may associate an attribute with the range of valid concepts that may be used as its value (i.e. an Attribute Range Rule). Attribute Domain Rules also define whether or not each attribute is considered to be grouped (by a Description Logic reasoner) for the given domain, and the attribute cardinalities for that domain. page-break