+@node Analysis brackets
+@subsection Analysis brackets
+@cindex brackets
+@cindex phrasing brackets
+@cindex musicological analysis
+@cindex note grouping bracket
+
+Brackets are used in musical analysis to indicate structure in musical
+pieces. LilyPond supports a simple form of nested horizontal brackets.
+To use this, add the @internalsref{Horizontal_bracket_engraver} to
+@internalsref{Staff} context. A bracket is started with
+@code{\groupOpen} and closed with @code{\groupClose}. This produces
+@internalsref{HorizontalBracket} objects.
+
+@lilypond[singleline,verbatim]
+\score { \notes \relative c'' {
+ c4-\groupOpen-\groupOpen
+ c4-\groupClose
+ c4-\groupOpen
+ c4-\groupClose-\groupClose
+ }
+ \paper { \translator {
+ \StaffContext \consists "Horizontal_bracket_engraver"
+ }}}
+@end lilypond
+