From: "Arthur" <[log in to unmask]>
> I have a few questions about the 'hanging numbers' that typefaces like
> FFMeta has.
These are "text figures," equivalent to (and used with) lower case
characters. "Titling figures" are (as you found) the upper case of figures,
and look best (as you might guess) with an all-cap line.
See "The Elements of Typographic Style" by Bringhurst, pp 46 ff.