1%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    2%
    3% Output predicates
    4% This version of the output predicates disables almost all output
    5%
    6
    7pdl_write(_).
    8pdl_on_write(_).
    9pdl_nl.
   10pdl_on_nl.
   11pdl_write_ln(_).
   12pdl_writef(_,_).
   13pdl_tab(_)