Invoice 
Definition
A message to the buyer of goods or services; the message contains the following information, in addition to other details:
Name of the goods or services
Quantity sent
Remuneration due
The materials are identified either by the material number, or the Global Trade Item Number (GTIN).
Use
EAN.UCC/GS1 Compliance adds the following new features to the existing mySAP ERP processes:
In the IDocs, a material number is determined from a GTIN, and from additional information, using determination logic.
This enables the material-related processes to be carried out in the same way as before.