+ but neither of them are allowed if 'name' is provided (and vice versa), excepting 'flags' when 'may' or 'shouldnot' is
+ present in dictionary avp (actually bit P is deprecated by standard group, then, 'may' or 'shouldnot' won't be taken
+ into account for this bit: it someone uses it, our xml representation will differ from reality. At least with this
+ sacrifice in return, we will have nicer xml layouts in most of the cases):