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The OWL Axiom Reference Set is designed to cover all logic definitions in SNOMED CT. A concept can be defined by one or more axioms in the same module or different modules. Each axiom is represented by a string in

tOWL Functional Syntax
GlosTermOWL Functional Syntax
 in the owlExpression field. Each concept is represented by a concept ID in the referencedComponentId in the refset. The referencedComponentId has no impact on the semantics of the axioms and it is not used for any logical reasoning. The following rules should be followed when assigning the referencedComponentId for an axiom: