A technique for reducing the amount of compilation required when
a procedure of function body is changed, developed or prototyped.

There is a methodology of using Ada packages that results in
each procedure and function being a subunit, thus residing in
its own file that can be compiled ( recompiled ) without
the parent unit being recompiled.


  package ANY_PACKAGE is      
    -- type definitions
    procedure ANY_PROCEDURES ( parameters ... ) ;
     ...
    function  ANY_FUNCTIONS  ( parameters ... ) return SOMETHING ;
     ...
  end ANY_PACKAGE ;      


  package body ANY_PACKAGE is      
      -- optional type or local subprogram definitions
    procedure ANY_PROCEDURES ( parameters ... ) is separate ;
     ...
    function  ANY_FUNCTIONS  ( parameters ... ) return SOMETHING is separate ;
     ...
  end ANY_PACKAGE ;      


  separate ( ANY_PACKAGE )
  procedure ANY_PROCEDURES ( parameters ... ) is 
     -- declarations
  begin
     -- executable statements
  end ANY_PROCEDURES ;

     ...

  separate ( ANY_PACKAGE )
  function  ANY_FUNCTIONS  ( parameters ... ) return SOMETHING is 
     -- declarations
  begin
     -- executable statements
  end ANY_FUNCTIONS ;

     ...