RFC: naming for FrontTransversal and Transversal ranges

[BLS]

Andrei ,
many thanks, ( not only because you are taking  the time to  explain ), 
I think I have to  say  “Thanks Andrei” because your answer was very 
gentle, ... ignoring all my grammar and (more important) logical 
mistakes... let me remain with a : You are listening and this is in my 
world : very generous.

Still : Container RFC ?
Björn