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The logical model must support the following capabilities:
Function | Details |
Concept reference | The ability to reference a precoordinated SNOMED CT concept using its identifier and optional human-readable term. |
Intersection / Conjunction | The ability to connect two focus concepts via a logical AND operator. |
Refinement | The ability to refine (or specialise) the meaning of an expression using one or more attributes values. |
Attribute group | The ability to group a collection of attributes which operate together as part of a refinement. |
Attribute | An attribute-value pair which further refines the meaning of the expression |
Nesting | The ability to include an expression as the value of an attribute |
Concrete values | The ability to use integers, decimals, strings and strings booleans as attribute values |
Definition status | The ability to specify whether the clinical meaning is 'equivalent to' or a 'subtype of' the expression. |
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