The octave shift type indicates where notes are shifted up or down from their true pitched values because of printing difficulty. Thus a treble clef line noted with 8va will be indicated with an octave-shift down from the pitch data indicated in the notes. A size of 8 indicates one octave; a size of 15 indicates two octaves.
<xs:complexType name="octave-shift"><xs:annotation><xs:documentation>The octave shift type indicates where notes are shifted up or down from their true pitched values because of printing difficulty. Thus a treble clef line noted with 8va will be indicated with an octave-shift down from the pitch data indicated in the notes. A size of 8 indicates one octave; a size of 15 indicates two octaves.</xs:documentation></xs:annotation><xs:attribute name="type" type="up-down-stop" use="required"/><xs:attribute name="number" type="number-level"/><xs:attribute name="size" type="xs:integer" default="8"/><xs:attributeGroup ref="print-style"/></xs:complexType>