Hi John, Werner wrote: > > .\" NS Dd user macro (not parsed, not callable) > > I no longer know, sorry. It marks documentation lines, that's for > sure.
They appeared in a48ab7b6db26b1d98f77f59f22896fe02a700c40, Author: James Clark <j...@jclark.com> Date: Wed Mar 18 04:29:18 1992 -0500 groff before CVS: release 1.05 and part of CHANGES there says The -mdoc macros have been upgraded to the version in the second Berkeley networking release. This version is not completely compatible with earlier versions; the old version is still available as -mdoc.old. So you may find a hint in an old BSD that can code to process them. Cheers, Ralph.