Field help (NDFACCSTR) 

Specify here an account root. When the setup is carried out, the rules are applied line by line and several rules can affect the same account. The order in which the lines are entered is important. It is necessary to enter the account roots from the most global to the most detailed.

An account root is not limited to a single character and the attachment level can thus be further refined.

For instance:
Let us consider the account roots: 6 CHARGES and 641 PERSO.
All the accounts starting with 641xx are allocated to the "PERSO" analytical account whereas the accounts starting with 6xx are allocated to the "CHARGES" analytical charges.

This setup is recovered and systematically suggested at the record account level.