title: Selecting Categories using API in Amazon MWS
body: <p>I am developing a integration between a desktop application and Amazon MWS and need to be able to offer users a choice of categories to put the product they are listing into. My problem is that I can't find any way of programmatically getting the current categories from MWS using the API.</p>
  
  <p>Additionally once I have a category reference to use I will need a way to the pull in and add the category specific XML child of ProductData (eg Home, Jewelry, Computers, etc) but they don't seem to be linked in any well defined way. For example, I can't say "<em>if the chosen category is reference nnnnn ask them to populate the Computers specific ProductData</em>", unless I write something myself to map them.</p>
  
  <p>Has anyone else come across these problems and found a workable solution?</p>
  
  <p>Any help appreciated... </p>
  
  <p>I am currently exploring the option of limiting users to only selling products already listed on Amazon but still can't figure out how to pull in the correct category specific XML.
  There are various product look-ups but they all seem to work from either my SKU (which will not yet be there) or Amazons ASIN (which I don't yet know)</p>