Originally Posted by
Gardyloo
The first letter in your RTW product is the booking class - A for first class, D for business, L for economy, thus DONE4 = business class, 4 continents.
That assumes it is a OneWorld (i.e. xONEx or xGLOBx) product in the first place. There are a few other RTW products out there that book in different fare buckets.