Context: Arden Syntax is a standard that encodes knowledge as Medical Logic Modules (MLMs) but lacks a standard query data model and terminology.
Objective: Assess to what extent SNOMED CT can represent MLM query data elements.
Method: 340 MLMs containing 3268 queries were examined.
Result: SNOMED can be used to represent all data elements except for clinical decision support system terms such as "alert."
Conclusion: SNOMED CT adequately represents data queried using the Arden Syntax.
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