Adaptation to the scheme of kosit: standard: xrechnung_2.0
You can find resources here: https://basket.l3montree.com/s/szyKB7rEJPzpEj8
This document provides the main necessary information: https://basket.l3montree.com/s/Y2KzHFDfNqC36CD
The kosit validator java tool can be downloaded here: https://github.com/itplr-kosit/validator