staff-type data type

The staff-type value specifies different uses for the staff.

Base type: string

Allowed values

alternate An alternate staff shares the same music as the prior staff, but displayed differently (e.g., treble and bass clef, standard notation and tablature). It is not included in playback. An alternate staff provides more information to an application reading a file than encoding the same music in separate parts, so its use is preferred in this situation if feasible.
cue A cue staff represents music from another part.
editorial An editorial staff represents musical alternatives created by an editor rather than the composer. It can be used for suggested interpretations or alternatives from other sources.
ossia An ossia staff represents music that can be played instead of what appears on the regular staff.
regular A regular staff is the standard default staff-type.

Where is this type used?