John argues that ODA is the answer that meets key requirements regarding
flexibility (to carry documents from a variety of sources) and simplicity
(in terms of content-type handling). Further, details regarding format
can be punted to the IETF & ISO WGs responsible.
I like this general solution to a general problem, being superior to
the specific solutions outlined so far. To mandate nroff is too limiting
and too parochial (Unix-oriented). It does not facilitate general exchange,
only allowing some members of the Unix-community to exchange documents.