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;