"Core code other" was intended to refer to non 21.4 or 21.5 versions,
such as 21.1 or the Carbon branch. I guess it could be broken up that
way, but then version would have to be a separate field.
9. "core code other" should be broken up[sic] into "core code other"
and "core code lisp", with "core code other" covering lib-src and
lwlib and "core code lisp" covering (obviously) the core lisp code.