An interactive web app for learning SNOMED CT Expression Constraint Language (ECL), focused on medicines and clinical terminology.
🔗 Live Demo: snbyrnes.github.io/ABC-of-ECL
- Multi-Page Site — Dedicated pages for Home, Builder, Examples, and Resources
- 15+ Query Templates — Pre-built templates for medicines, clinical findings, and procedures
- Live Concept Search — Search SNOMED CT concepts in real-time
- Plain English Descriptions — Understand what each query does before running it
- ECL Query Anatomy — Interactive breakdown explaining each part of the ECL syntax
- Page Guide — Collapsible guide explaining how to use each section
- ECL Generation — Watch queries build as you configure parameters
- Real Results — Execute against CSIRO Ontoserver FHIR API
- Syntax Reference — Quick reference cards for ECL operators
- Dark/Light Theme — Toggle between themes
- Changelog Modal — View version history from footer link
- PWA Support — Installable as an app with offline-ready manifest
- SEO Optimized — Structured data, meta tags, and sitemap for search engines
- Fully Static — Runs entirely in the browser
Visit snbyrnes.github.io/ABC-of-ECL
git clone https://github.com/snbyrnes/ABC-of-ECL.git
cd ABC-of-ECL
# Open index.html in your browserNo build step or dependencies required.
ABC-of-ECL/
├── index.html # Home page - Introduction to ECL
├── builder.html # Interactive ECL Query Builder
├── examples.html # Example queries & syntax reference
├── resources.html # Documentation & learning resources
├── styles.css # Styles (light/dark themes)
├── app.js # Application logic & FHIR integration
├── favicon.svg # Site favicon
├── manifest.json # PWA manifest for installability
├── sitemap.xml # XML sitemap for search engines
├── robots.txt # Search engine crawl instructions
├── CHANGELOG.md # Version history
├── roadmap.md # Enhancement roadmap
├── .nojekyll # GitHub Pages config
└── .github/
└── workflows/
└── deploy.yml # GitHub Actions deployment
This project is under active development and welcomes feedback!
- 🐛 Report bugs or suggest features: GitHub Issues
- 📋 View the roadmap: See roadmap.md for planned enhancements
This app queries the public CSIRO Ontoserver FHIR R4 endpoint:
https://r4.ontoserver.csiro.au/fhir
Uses the ValueSet/$expand operation with ECL-based value set URLs.
Automatically deploys to GitHub Pages on push to main via GitHub Actions.
To deploy your own:
- Fork this repository
- Go to Settings → Pages → Source → GitHub Actions
- Push to
mainbranch
For educational purposes only. Not for clinical decision-making. SNOMED CT® is a trademark of SNOMED International.