> Nevetheless, in my modest opinion, the easiness of modern notation
> in LilyPond would be greatly upgraded if one might take the book of
> Edgard Karkoschka on the XX century notation and check out most
> common features used by all composers discussed in this very
> informative book
This is certainly true. However, who is 'one'? Maybe you?
> In comparison to enormously rich resources devoted in documentation
> to ancient and medieval notation (circa 100 noteheads only!),
Well, the author of Gregorian chant notation support was very
interested in this topic and contributed both code and documentation.
Werner