I'm starting to implement requesting question and user activity in [my framework](http://stackapps.com/questions/346), but the new 1.1 API documentation doesn't seem to indicate what the possible return values are for the fields any more.

Where can I go to find this information?  (Specifically, I'm looking for the possible return values to the `timeline_type` and `action` keys)  I realize that I can just make a bunch of requests and try and figure this out myself, but this *should* be documented somewhere...