Where do I find OCPI protocol documentation?

OCPI protocol documentation is available at: 

• OCPI 2.1.1: https://github.com/ocpi/ocpi/blob/release-2.1.1-bugfixes/mod_cdrs.md 
• OCPI 2.2.1: https://evroaming.org/wp-content/uploads/2024/11/OCPI-2.2.1-d2.pdf