GDP: staff section

[Till Rettig]

Hi GDP-helpers!

I started now finally with the staff section of NR1.
As with the repeat section, I would also suggest some new grouping.
The order of the section is now the following:

# 1.6 Staff notation
   * 1.6.1 Displaying staves
         o 1.6.1.1 System start delimiters
         o 1.6.1.2 Staff symbol
         o 1.6.1.3 Hiding staves
   * 1.6.2 Writing parts
         o 1.6.2.1 Metronome marks
         o 1.6.2.2 Instrument names
         o 1.6.2.3 Quoting other voices
         o 1.6.2.4 Formatting cue notes

I was first wondering why "writing parts" is here at all, but I guess 
this should not be discussed too broad now, because it had been 
discuessed when we decided about the GDP chapter order. I was just 
thinking that "combining parts" and "writing parts" would be together 
something like a "orchestral" chapter -- even though you use it also in 
chamber music and the like. So I hope this grouping as it now is is 
intuitive enough to a new user that he figures out where to look for.

The 1.6.1 section is really unevenly distributed over the three 
subsubsections, I was thinking of introducing a new subsection: 
modifying staves which would contain most of 6.1.1 and 6.1.2
So the new section model could be:

1.6 Staff notation
   1.6.1 Displaying/writing/setting staves
      1.6.1.1 Initiating a new staff (short basics, also one sentence 
about \new and \context, here should also go the example about starting 
stopping additional staves)
      1.6.1.2 Grouping staves (about system start delimiters
      (maybe: 1.6.1.3: Deeper nesting of staff groups)
   1.6.2 Modifying staves
      1.6.2.1 Staff symbol, (and how to modify the different parameters)
      1.6.2.2 Ossia staves
      1.6.2.3 Hiding staves
   1.6.3 Writing parts
      ...

I have concentrated for now on this part leaving the parts section 
alone, I want to come back to it only when the first part is in better 
condition.
There are still some general questions for the parts section for which I 
would like to hear some feedback:

-Why is the metronome mark described here? It applies as well to a whole 
score (where it would be agreedly on the top stave...), and I think it 
should go together with a general description on how to write tempo 
indications (and also with a workaround to align the indication with the 
key or the meter, not with the first note of the first bar). Where could 
this section go?
It is currently discussed in text marks, 1.8.1.4, but meant to write 
rehearsal marks, not tempo indications.

-I think it is actually almost a bug in lilypond that there is no easy 
way to center the beginning of a tempo indictation on the key symbol, so 
I think it is important to provide at least an workaround clearly marked 
as such for this purpose.

-We see the parts section as the sections that explains everything 
general about single parts -- so in this sense the metronome mark 
belongs here and also the tempo indication. But to me (and my German 
ears) the section caption points at preparing parts for each instrument 
of a bigger score. So I think we should change this section's caption. 
Ideas?

-To me there is a distinction between the two first subsubsections 
(metronome marks and instrument names) and the two last (quoting voices 
and cue notes): the first two I would see more generally apllying to 
staves for each instrument/voice, the two last are what I understand by 
the word "part", mainly concerned about the case where one has only 
one's own part and needs to get some context into it. So I could even 
imagine still a new subsection:

1.6.3 Additions to specific staves
   1.6.3.1 tempo indication
   1.6.3.2 metronome mark
   1.6.3.3 instrument name
1.6.4 Adding context to a single part
   1.6.4.1 quoting
   1.6.4.2 cue notes

But this is only a first thought.

Greetings
Till