The display-step-octave type contains the sequence of elements used by both the rest and unpitched elements. This group is used to place rests and unpitched elements on the staff without implying that these elements have pitch. Positioning follows the current clef. If percussion clef is used, the display-step and display-octave elements are interpreted as if in treble clef, with a G in octave 4 on line 2. If not present, the note is placed on the middle line of the staff, generally used for one-line staffs.
<xs:complexType name="display-step-octave"><xs:annotation><xs:documentation>The display-step-octave type contains the sequence of elements used by both the rest and unpitched elements. This group is used to place rests and unpitched elements on the staff without implying that these elements have pitch. Positioning follows the current clef. If percussion clef is used, the display-step and display-octave elements are interpreted as if in treble clef, with a G in octave 4 on line 2. If not present, the note is placed on the middle line of the staff, generally used for one-line staffs.</xs:documentation></xs:annotation><xs:sequence minOccurs="0"><xs:element name="display-step" type="step"/><xs:element name="display-octave" type="octave"/></xs:sequence></xs:complexType>