I'm trying to set up a 'course schedule' section on my website. Each course is going to have properties like start date, end date, course name, plus a category and sub-category. I would like to be able to manage this schedule by making a node for each course as a direct descendant of my 'course schedule' node (not by placing them under certain nodes to categorize them), and I'd like to be able to set a category and subcategory for each course node using some property in its datatype, like an XPath DropDownList.

Elsewhere on the Umbraco backend, I want to be able to manage the list of available categories and subcategories in a node, without having to go in and modify options on a datatype.

I thought of making a document type for 'course categories' and using a MultiType datatype to manage a list of categories, but that would only work for a single level of categories, no sub-categories. Does anyone know how I might be able to set up something like this?

Any help would be appreciated.