question about multiple choir staff's in one system

[Yvan Vander Sanden]

Hi,

 

i am new at using Lilypond and using jEdit with the lilypondtool to start working on a score. Basicly things are working very good, but I am trying to work out brackets and braces. I first tried something like this, but that does not work:

 

\score {
 \new ChoirStaff <<
  \staffSoprano
  \staffAlto
  \staffTenor
  \staffBass
 >>
 \new ChoirStaff <<
  \staffSopranoII
  \staffAltoII
  \staffTenorII
  \staffBassII
 >>
 \new ChoirStaff << 
  \staffSopranoIII
  \staffAltoIII
  \staffTenorIII
  \staffBassIII
 >>
 }

 

But, In the end I just tried to nest them, because everything else failed, like this:

 

 

\score {
 \new ChoirStaff <<
  \staffSoprano
  \staffAlto
  \staffTenor
  \staffBass
  \new ChoirStaff <<
    \staffSopranoII
    \staffAltoII
    \staffTenorII
    \staffBassII
    \new ChoirStaff << 
      \staffSopranoIII
      \staffAltoIII
      \staffTenorIII
      \staffBassIII

   >>

  >>
 >>
 }

 

And yes, it worked... but I don't understand why this is correct. The other way seems much more logical. Since i always learn much faster if I know WHY something has to be done in a particular way, I'd love it if someone can explain this to me. 

 

 

Regards,

 

yvan vander sanden