# ONIX for Books 3.0

Source: https://xmlvalid.com/schemas/onix-3.0

> ONIX 3.0 book metadata with reference tag names, the version most trading partners still take.

ONIX 3.0 has been the main book trade version since 2009; 3.1 extends it. Many retailers accept only 3.0.

- Type: XSD
- Version: 3.0, code lists issue 75
- Namespace: `http://ns.editeur.org/onix/3.0/reference`
- Root element: `ONIXMessage`
- Publisher: EDItEUR (EDItEUR terms of use (free of charge, unmodified)), source: https://www.editeur.org/93/Release-3.0-Downloads/
- Validate against it: https://xmlvalid.com/validate?schema=onix-3.0

## Notes

- The schemas are kept exactly as EDItEUR publishes them. The example is the sample file that ships with them.