Welcome to the RD-CDM Documentation!

The ontology-based rare disease common data model (RD-CDM) is a non-balloted extension of the ERDRI-CDS which aims to provide as an internationally viable template for the development and implementation of country-specific Rare disease common data models. The RD-CDM is designed to be compatible with the GA4GH Phenopacket Schema, HL7 FHIR, and the International Patient Summary. The ontology-based approach of the RD-CDM allows for the integration of various data sources and the harmonization of data across different systems.

Tip

The RD-CDM paper has now been published at Nature Scientific Data. You can read it here!

Contents:

• Background
  • Introduction
  • Methodology
  • Overview
  • Table Columns
  • Layers of harmonisation
• Resources
  • Schema
  • Latest RD-CDM — Combined Files
  • Latest RD-CDM — Individual Components
  • RD-CDM v2.0.0 (outdated)
• Usage
  • RareLink
• Contributing
  • 1. GitHub Issues
  • 2. Reach out directly
  • 3. Implementation
  • 4. Documentation
• License
• Changelog
  • v2.0.3 (2026-03-24)
  • v2.0.1 & v2.0.2 (2025-08-07)
  • v2.0.0 (2025-02-08)
  • v2.0.0.dev0 (2024-09-30)

Indices and tables

• Index

• Module Index

• Search Page