Feeds come in two types: flat text files, which you can build using a spreadsheet
application, and XML documents. You can find templates for creating flat text
files and XML files for inventory and orders on Seller Central for your locale.
If you are using XML-formatted feeds, see Selling on Amazon Guide to XML for guidance. If you need
to determine the correct ItemType for a feed, see the Category-Specific XSDs table in the Seller Central Help.