Generally, there three kind of points for prototype under a procedure. First point for global parameters; Secode point for input parameters; Three point for output parameters.

First manifestation:

     callp MyProc(Point1:Point2:Point3) ;

p Myproc          b

d Myproc          pi

d   Point1                                      *

d   point2                                      *

d   point3                                      *

Secode manifestation:

     callp MyPorc(Point) ;

p MyProc              b

d MyProce            pi

d point                                         *

*

D Point                 Ds

D   Point1                                     *

D   Point2                                     *

D   Point3                                     *