This is a nice idea. It is also applied in a similar way to the so called "SKR Kontorahmen" which is basically a system for categorizing transactions in account

This is a nice idea. It is also applied in a similar way to the so called "SKR Kontorahmen" which is basically a system for categorizing transactions in accounting. see: https://www.datev.de/web/de/datev-shop/material/skr-04-englisch/ https://www.datev.de/web/de/datev-shop/material/skr-04-engli...