Snow Owl Client Reference
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7.19.1
Table of Content
🦉
Introduction
Getting Started
User Interface
Preferences
🔎
Browsing and Searching
SNOMED CT View
Searching
Semantic Queries
ECL Operators
ECL Editor
Project Explorer View
Query Language Extension
Scripting
Copying Content
📝
Editing and Authoring
Authoring Mode Selection
SNOMED CT Concept Editor
SNOMED CT Editing
Evaluating Changes
🧠
Description Logic
Running the Classification
Classification Results
Reasoners
🧱
Concept model
Machine Readable Concept Model
Editing MRCM
📄
Reference Sets
Reference Set Types
Reference Set View
Reference Set Editor
Authoring
Combining Reference Sets
Compare Reference Sets
📚
Value Sets
Value Sets
Value Set View
Value Set Editor
Import
Authoring
Combining Value Sets
Export
🌏
Mapping Sets
Mapping Sets
Mapping Sets View
Mapping Set Editor
Import
Authoring
Mapping Set Transformations
Automapping
Comparing Mapping Sets
Validation
Export
🏥
Local Code Systems
Import
Searching
Authoring
Validation
Export
📅
Versioning
Introduction
Creating a New Version
Switching Between Versions
Version Compare
🔁
Content Management
Code Systems
Code Systems View
SNOMED CT Importing
SNOMED CT Publishing
SNOMED CT Extensions
SNOMED CT Upgrade
👩‍⚕️👨‍⚕️ Collaborative authoring
Task Life Cycle
The Task List View
Task Editor
Authoring
Task Query
✅
Validation
Run Validation
Validation Issues View
Whitelisting
📓
SNOMED CT Templates
SNOMED CT Templates
Import
Templates View
Authoring
Concept Creation by Templates
Export
🩺
UMLS Code Systems
Import
Manage Code Systems
Searching and Browsing
🛑
Error Handling
Troubleshooting
Error Messages
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Semantic Queries
Expression Constraint Language (ECL) is a formal syntax for representing SNOMED CT expression constraints. Expression constraints are computable rules used to define bounded sets of clinical meanings represented by either precoordinated or postcoordinated expressions.
Snow Owl includes an editor and execution environment for ECL. All of the operators and grammar constructs defined in the Expression Constraint Language specification are supported. Using ECL, you can query concepts by their relationships as opposed to their human-readable descriptions.
You can check out our examples in the Project Explorer view: Snow Owl_examples/ECL.
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ECL Operators
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