Numbered musical notation (Jianpu)

[Silas S . Brown]

Would it be feasible to make Lilypond produce the numbered musical notation
described at http://en.wikipedia.org/wiki/Numbered_musical_notation ?

It's very widely used in China, and many Chinese singers and traditional
instrumentalists can't read anything else, so it would be useful to be able to
produce it.

As can be seen from that page, many aspects of numbered notation are borrowed
from standard musical notation (slurs, hairpins, beaming divisions, expression
marks, etc), and some publishers mix the two in the same score, so it would seem
sensible to generate it within Lilypond rather than separately - compare with
Lilypond's current support of guitar tablature.