\header place in \score block (doc & syntax clarification)

[Marc Mouries]

 The documentation here 
http://lilypond.org/doc/v2.12/Documentation/user/lilypond-learning/Introduction-to-the-LilyPond-file-structure#Introduction-to-the-LilyPond-file-structure

says: "A \score block must always contain just one music expression, and 
this must appear immediately after the \score command."
and: "these three commands – \header, \layout and \midi – are special: 
unlike many other commands which begin with a backward slash (\) they 
are not music expressions"

Which implies that the \header must be placed after the music 
expression. However, I found that with version 2.12, the lilypond 
accepts that the header is placed before as well.

\version "2.12.3"
\score {
\header { piece = "lilypond compiles a score where header is placed 
before the music expression"}
{ c'4 a b c' }
\layout { }
}

If lilypond compiles the file, I'd assume the documentation needs to be 
updated???
Would you mind clarifying?

-Marc

test header place.ly
Description: Text Data