Comment #5 on issue 2074 by [email protected]: Add crossreferences to NR Appendix C "Lilypond Grammar"
http://code.google.com/p/lilypond/issues/detail?id=2074
It would still be a 'nice to have', but doing it requires quite a lot of work, involving programming. Let's just leave it as an issue. Someone one day might find it an interesting exercise.
