PK_boolean_select_t    


typedef int PK_boolean_select_t;


PK_boolean_select_t has three values:
    PK_boolean_select_specific_c        specified region must not be on or
                                        adjacent to imprinted topology
    PK_boolean_select_adjacent_c        specified region may be on or
                                        adjacent to imprinted topology
    PK_boolean_select_propagate_c       region selection will be propagated
                                        to new regions if the specified
                                        region is split