The following entries are common to all
RPG specifications preceding
program data in column-limited source (see Fully free-form statements):
If it is a free-form statement, positions 6-7 must be blank.
If it is a fixed-form statement, the specification type
is specified in position 6. The following letter codes can
be used:

See
free-form comments
for more information about comments in free-form specifications.
