Expression Constraint Language

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The

The Expression Constraint

Specification and Guide specifies the syntax and interpretation of

Language is a formal syntax for representing SNOMED CT expression constraints. Expression constraints are computable rules used to

define a bounded sets of clinical

define a bounded set of clinical meanings represented by either precoordinated or postcoordinated expressions. Expression constraints can be used to restrict the valid values for a data element in an EHR, as the intensional definition of a concept-based reference set, as a machine processable query that identifies a set of matching expressions

. Latest web

, or as a constraint that restricts the range of an attribute defined in the SNOMED CT concept model.

This document defines and describes the current version of the Expression Constraint Language - ECL v2.2.

Web browsable version: http://snomed.org/ecl

Directory of available documents: 

SNOMED CT Document Library: http://snomed.org/doc

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titleSNOMED CT
Expression Constraint Language
Specification and Guide
wip-spaceWIPECL
doc-spaceDOCECL
linkhttp://snomed.org/ecl
pdf-namedoc_ExpressionConstraintLanguage_v2.2-en-US_INT_20231122.pdf
versionVersion 2.2
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