Standard Headers

All applications, subroutines and functions must begin with a standard header or prologue. These are obtained by including the following logical names:

          APP_PRO      -  for top level routine of application
          SUB_PRO      -  for library subroutines or subroutines
                          within applications
          FUN_PRO      -  same as above but for functions
          NODDY_PRO    -  for simple subroutines which don't pass
                          STATUS as an argument

All applications should begin with a call to the general ASTERIX initialisation routine AST_INIT() and end with AST_CLOSE(). This will ensure the integrity of the internal common blocks used by the various internal sub-systems.