1 dcl       1 pl1_symbol_block  aligned based,
 2           2 version           fixed bin,
 3           2 identifier        char(8),            /* must be "pl1info" */
 4           2 flags,
 5             3 profile         bit(1) unal,
 6             3 table           bit(1) unal,
 7             3 map             bit(1) unal,
 8             3 flow            bit(1) unal,
 9             3 io              bit(1) unal,
10             3 table_removed   bit(1) unal,
11             3 long_profile    bit(1) unal,
12             3 pad             bit(29) unal,
13           2 greatest_severity fixed bin,
14           2 root              unal bit(18),
15           2 profile           unal bit(18),
16           2 map               unal,
17             3 first           bit(18),
18             3 last            bit(18),
19           2 segname           unaligned,
20             3 offset          bit(18),
21             3 size            bit(18);