Field help (GDADIA) 

This code (1 to 10 alphanumerical characters) is used as the sole identifier of the account structure.

A structure can be used in invoice entry mode of the A/P-A/R Accounting mode and/or in the parameterization of the journal entry transactions. In an invoice of the A/P-A/R Accounting module, the structure can be used on the invoice line using the "Structure" button.