The SNOMED CT Expression Constraint Language is a formal language for defining bounded sets of clinical meanings represented by either precoordinated or postcoordinated expressions.

Status

SNOMED CT expression constraint language version 2.1 has been published at http://snomed.org/ecl. 

Implementations

SNOMED International is aware of the following implementations of This page is used to share documents about the SNOMED CT Expression Constraint Language with the SNOMED CT Languages Project Group.:

• Snowstorm - SNOMED International Terminology Server (via REST API) - https://github.com/IHTSDO/snowstorm
  • Provides API for the SNOMED International public browser (See "Expression Constraint Queries" tab) - https://browser.ihtsdotools.org/
• SNOMED International SNOMED CT Query Service - https://github.com/IHTSDO/snomed-query-service
• CSIRO Ontoserver Expression Constraints - https://ontoserver.csiro.au/shrimp/ecl.html (help)
• ECL Syntax Parser - https://github.com/hsolbrig/SNOMEDCTParser
• Hermes:  https://GitHub.com/wardle/hermes 

• PHAST's FHIR Terminology server STS -  https://topaze.phast.fr/resources-server/api/fhir

  • Available 24x7 for testing, through CSIRO's VS tool -  https://ontoserver.csiro.au/vstool/

• Slang - http://slang.snomedic.com:8080/yats/ 
• SnoLyze - https://github.com/slaverman/SnoLyze (ECL v1.2)
• Snomedizer: https://github.com/ramses-antibiotics/snomedizer
• Snow Owl
  • Terminology Server (via REST API) - https://github.com/IHTSDO/snow-owl
    
  • ECL 2.1 - https://github.com/b2ihealthcare/snow-owl 
• SNQuery - http://snquery.veratech.es/
• Terminz - https://terminz.azurewebsites.net/fhir
• termMed’s termSpace - http://demo.termspace.com/ and https://termmed.atlassian.net/wiki/display/TSD/Creating+queries
• West Coast Informatics (WCI) SNOMED Terminology Server - https://snomed.terminology.tools/terminology-ui/index.html

If you know of additional ECL implementations, please contact info@snomed.org with details. Attachmentsuploadtrue