Renames: use of it....

[vashwath@rediffmail.com (prashna)]

Hi all,
I am doing a code review for a one of the module in flight management
computer.
One the procedure is calling an another procedure
(COMMANDS.EXECUTE_SCROLL) from a package called COMMANDS.
In package COMMANDS the declaration of the procedure EXECUTE_SCROLL is
as follows :
procedure EXECUTE_SCROLL (MCDU_ID   : in
MMI_APPLICATION_TYPES.T_MCDU_ID;
                             DIRECTION : in CONTEXT_TYPES.T_DIRECTION)
renames ACTION_CONTROLER.EXECUTE_SCROLL;

All the procedures in this package is rename of a procedure in package
ACTION_CONTROLER or some other package. Why is it so?Why can't use the
procedure from the package ACTION_CONTROLER itself(i.e instead of
calling COMMANDS.EXECUTE_SCROLL why can't they use
ACTION_CONTROLER.EXECUTE_SCROLL)?Is the package COMMANDS really
required?

Thanks in advance,
ashwath