Amazon Services
Amazon Marketplace Web Service (Amazon MWS) Documentation
Amazon MWS Documentation

FeedTypes

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.