Solve it by detailing the past, not defining a new format to replace all others (aka format #11). I got the impression they wanted to to the latter until the se

Solve it by detailing the past, not defining a new format to replace all others (aka format #11). I got the impression they wanted to to the latter until the second half. Sounds a reasonable plan, though scanning in all sorts of records between typewriter and file formats (not a time period I know anything about) is the sort of thing to be done the same way and possibly more important.