(music-property-description 'name symbol? "Name of this music object")
(music-property-description 'numerator integer? "numerator of a time signature")
(music-property-description 'once boolean? "Apply this operation only during one time step?")
+(music-property-description 'original-pitch ly:pitch?
+ "Pitch before inversion. Needed to reconstruct chord name.")
(music-property-description 'origin ly:input-location? "where was this piece of music defined?")
(music-property-description 'penalty number? "Penalty for break hint.")
(music-property-description 'pitch ly:pitch? "the pitch of this note")