2.4.1 Omitted material

LilyPond input must be surrounded by { } marks or ‘\relative { … }’ (see Working on input files). For the rest of this manual, some short examples omit this. To replicate these examples, you can copy displayed input, but paste it between ‘{’ and ‘}’ in your input file.

{
  …example goes here…
}

Also, remember that every LilyPond file should have a \version statement. Because the examples in the manuals are snippets, not files, the \version statement is omitted. But you should make a practice of including them in your files.