1 digraph pdomapping {

     2     size="7,9"

     3     center=1

     4 	ratio=fill

     5 

     6     enter_map_pdo [shape=point,label=""]

     7 

     8     start -> enter_map_pdo

     9     enter_map_pdo -> pdo_count

    10     enter_map_pdo -> map_pdo

    11     enter_map_pdo -> end

    12     map_pdo -> map_pdo

    13     map_pdo -> error

    14     map_pdo -> pdo_count

    15     pdo_count -> pdo_count

    16     pdo_count -> error

    17     pdo_count -> enter_map_pdo

    18 }