I like John's idea of KHFO.
Would it then be possible to really free up the "type" field in the
Content-type header? By which I mean, allow it to vary independent of
the format "sub-type", so that both
Content-type: TEXT-PLUS/POSTSCRIPT
and (in a different message, of course :-)
Content-type: IMAGE/POSTSCRIPT
would be allowed? I think this would go a long way to removing some of
the semantics problems with the "type" field, but I remember some very
impassioned arguments about allowing a sub-type to appear only as a
sub-type of one particular type category (though the technical basis for
those arguments has escaped me).
Bill