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To be able to get the information, the xml file had to be stored in a repository previously.
Pressing this button, the posting screen will be shown with the information extracted from the xml file. Depending on the invoice type the correct tab will be shown (FI or MM):.
FI tab
MM tab
All the data that is shown in this screen is got brought from the xml through a mapping. All the fields are mapped in BAdIs and they can be implemented to change the standard mapping as desired.
The information of these BAdIs can be checked in the next link: 2.2.2.3 BAdIs for mapping in posting screen.
This screen can be enhanced with more fields in any of the blocks (general fields, FI fields, MM fields). The information to enhance this screen can be found in the following link: 2.2.2.4 Field enhancement for posting screen.