Is there a simple writeup on how the new categories work in the Documents module? I don't see anything in the online help. I've searched a number of times.

 We attempting this workflow with the DNN 4.9 and the most current version of the Document module.

Created a List called Site, added a sub-list called 'location' with two entries and values.

Opened the document setting; Selected the Category List option and specifed List> Site.location.  Saved.

Edit a document item and Tabbed to Category.  Box item = "Not Specifed"

Is this the correct workflow? Anything further with the documentation? 

Dave, I just finished testing your sub-list issue and I can reproduce what you describe.  Apparently it's a problem with the parsing of list values when there are multi-level lists.  I'm not sure if this is an issue in the Documents Module itself or in a core function that the Document Module utilizes.  I will pass along the details I gathered to the project team and see what can be done. If you create a single list with your two text/value pairs then they do appear in the drop down.

Chuck