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The following table contains the definition of terms used within this document. Please refer to the IHTSDO Glossary for additional SNOMED CT definitions.
Term | Definition | ||
|---|---|---|---|
Compositional Grammar | The set of rules that govern the way in which SNOMED CT expressions are represented as a plain text string. | ||
Concept Model | The model used to specify logical definitions of SNOMED CT concepts, using a combination of formal logic and a set of rules that determine the permitted sets of relationships between particular types of concepts. | ||
Domain | The set of concepts which may be refined using a given attribute.
| ||
Expression | A structured combination of one or more concept identifiers used to express a clinical idea. | ||
Expression Constraint | A computable rule that can be used to define a bounded set of clinical meanings. | ||
Machine Readable Concept Model (MRCM) | A representation of the rules that comprise the SNOMED CT Concept Model in a form that can be processed by computer software and applied to validate content. | ||
Postcoordinated Expression | A representation of a clinical meaning using a combination of two or more concept identifiers. | ||
Precoordinated Expression | A representation of a clinical meaning using a single concept identifier. | ||
Range | The set of concepts that are allowed as the value of an attribute.
| ||
Reference Set | A SNOMED CT file structure consisting of a set of references to SNOMED CT components. | ||
Substrate | The SNOMED CT content over which an expression constraint is evaluated or a query is executed. |
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