The Expression Constraint Language is a formal syntax for representing SNOMED CT expression constraints. Expression constraints are computable rules used to define a bounded sets 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, or as a constraint that restricts the range of an attribute defined in the SNOMED CT concept model.

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

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




Latest PDF Version for Download





The information below is only available to document editors and only visible in webview of the WIP space.

Some of this information is used in the PDF export.



titleSNOMED CT
Expression Constraint Language
Specification and Guide
wip-spaceWIPECL
doc-spaceDOCECL
linkhttp://snomed.org/ecl
pdf-namexdoc_ExpressionConstraintLanguage_v1.x-en-US_INT_YYYYMMDD.pdf
versionVersion 1.3
status
note






Search this document

Contents