The glyph-type data type

The glyph-type defines what type of glyph is being defined in a glyph element. Values include quarter-rest, g-clef-ottava-bassa, c-clef, f-clef, percussion-clef, octave-shift-up-8, octave-shift-down-8, octave-shift-continue-8, octave-shift-down-15, octave-shift-up-15, octave-shift-continue-15, octave-shift-down-22, octave-shift-up-22, and octave-shift-continue-22. This is left as a string so that other application-specific types can be defined, but it is made a separate type so that it can be redefined more strictly.

A quarter-rest type specifies the glyph to use when a note has a rest element and a type value of quarter. The c-clef, f-clef, and percussion-clef types specify the glyph to use when a clef sign element value is C, F, or percussion respectively. The g-clef-ottava-bassa type specifies the glyph to use when a clef sign element value is G and the clef-octave-change element value is -1. The octave-shift types specify the glyph to use when an octave-shift type attribute value is up, down, or continue and the octave-shift size attribute value is 8, 15, or 22.