Field help (ARZNUM)

This number is used to use the expression in a tag (n=number):
- X3E_n  managed in the "parsing" type patterns
- ^FNn  managed in the "mask" type patterns

This tag will be replaced by the valued value of the expression in the file.
A single number can be found several times. This is the defined condition on each line that is used to take into account the right number.