1 
 2 dcl       1 default                     based aligned,
 3           2 node_type                   bit(9) unaligned,
 4           2 source_id                   structure unaligned,
 5             3 file_number               bit(8),
 6             3 line_number               bit(14),
 7             3 statement_number          bit(5),
 8           2 next                        ptr unaligned,
 9           2 predicate                   ptr unaligned,
10           2 symbol                      ptr unaligned,
11           2 system                      bit(1) unaligned,
12           2 error                       bit(1) unaligned,
13           2 no_defaults                 bit(1) unaligned,
14           2 reserved                    bit(29) unaligned;