HOW TO USE XML PARTLIST ON BRICKLINK.COM
An "how to" file has been added to the "usefull link" section. This PDF explain in a clear and efficient way (at least i hope) the way you have to use XML partlists provided with instructions, on Bricklink.com
The PDF file:
https://docs.wixstatic.com/ugd/42b7cd_36640ae642004edfafb9c97b2e767bc7.pdf