# HL7 CDA Release 2

Source: https://xmlvalid.com/schemas/hl7-cda-r2

> The base schema of clinical documents such as discharge summaries, referrals and C-CDA documents.

CDA R2 defines the structure of clinical documents: a header about the patient, author and encounter, and a body of sections with narrative and coded entries. C-CDA and many national e-health programmes build on it.
This is the original normative schema. Documents that use the SDTC extensions (sdtc: namespace) need the extended schema and are not covered.

- Type: XSD
- Version: R2 (normative edition)
- Namespace: `urn:hl7-org:v3`
- Root element: `ClinicalDocument`
- Publisher: Health Level Seven International (HL7 schema license (BSD-style)), source: https://github.com/HL7/cda-core-2.0
- Validate against it: https://xmlvalid.com/validate?schema=hl7-cda-r2

## Notes

- Implementation guides such as C-CDA add templates and constraints in Schematron; they are not checked here.
- The example is the sample document from the HL7 CDA R2 normative edition.