Purpose code addition to masterdata, Voucher payment and financial gateway files

In many countries you need to add a purpose code to the vendor payment based on which service purchased.
Questions:

1. Is there a field in the masterdata we can use to enter the purpose code per supplier, and when more service have been purchased we can even add more purpose codes per service type.
2. this purpose type can be linked to the voucher
3. can this purpose type, which is linked to the voucher, be added to the paycycle and eventually to the Financial Gateway dispatch file.