Roman numeral chord notation in lilypond

[Patrick Taylor Ramsey]

Hello, all.

I'm a bit flummoxed; I've been searching for the last hour and a half for a way
to typeset roman numeral chord notation (ii, V65/V, N6) under a staff in
lilypond.... and found nothing, except for a lone message dating from 2003
stating that said notation wasn't yet supported.  Is this still the case?  And,
if so, why?  It does seem like there are far more arcane notations which *are*
supported... and this one is used by every beginning music theory course in the
us (and most likely elsewhere)

Just curious.

PTR