+
+ (RelativeOctaveMusic
+ . ((description . "Music that was entered in relative octave notation.")
+ (to-relative-callback . ,ly:relative-octave-music::relative-callback)
+ (iterator-ctor . ,ly:music-wrapper-iterator::constructor)
+ (length-callback . ,ly:music-wrapper::length-callback)
+ (start-callback . ,ly:music-wrapper::start-callback)
+ (types . (music-wrapper-music general-music relative-octave-music))
+ ))
+
+ (RepeatedChord
+ . ((description . "A chord repetition")
+ (to-relative-callback . ,ly:music-sequence::repeated-chord-relative-callback)
+ (iterator-ctor . ,ly:music-wrapper-iterator::constructor)
+ (start-callback . ,ly:music-wrapper::start-callback)
+ (length-callback . ,ly:music-wrapper::length-callback)
+ (types . (general-music music-wrapper-music))
+ ))
+