This is not a question about Google Reader usage, but about the parameters and results you get from making http GET requests to Google Reader.
This question goes out to anyone who might have had experience working with the largely undocumented Google Reader API.
Are the "read" and "kept-unread" tags for items mutually exclusive? If so, why not?
What is the "fresh" tag, and how does it work?
Are notes (items with the "created" tag) included when you query for reading-list items?