Re: Should vertical motions be in vees or ems? Where does the baseline go?

[Tadziu Hoffmann]

> - General typographic convention is to measure vertical
> motions in v's, not m's.  CSTR #54's definitions of \u, \d,
> and \r do not align with this common expectation.

I think this depends on what you consider the purpose of \d
and \u to be.  Obviously they are not needed: everything they
do can be achieved with \v.  However, if we assume they were
intended as an easy way to get super- and subscripts (e.g., for
footnote markers, or as in "H\d2\uO"), then you definitely want
the motion to be in units of the current font size and not in
baseline spacings.  Otherwise, those super- and subscripts
would be ripped from the text lines they belong to if you
were to try setting the text double-spaced by requesting
(say) .vs 24 for a 10-point font.