The degree-alter type represents the chromatic alteration for the current degree. If the degree-type value is alter or subtract, the degree-alter value is relative to the degree already in the chord based on its kind element. If the degree-type value is add, the degree-alter is relative to a dominant chord (major and perfect intervals except for a minor seventh). The plus-minus attribute is used to indicate if plus and minus symbols should be used instead of sharp and flat symbols to display the degree alteration; it is no by default.
<xs:complexType name="degree-alter"><xs:annotation><xs:documentation>The degree-alter type represents the chromatic alteration for the current degree. If the degree-type value is alter or subtract, the degree-alter value is relative to the degree already in the chord based on its kind element. If the degree-type value is add, the degree-alter is relative to a dominant chord (major and perfect intervals except for a minor seventh). The plus-minus attribute is used to indicate if plus and minus symbols should be used instead of sharp and flat symbols to display the degree alteration; it is no by default.</xs:documentation></xs:annotation><xs:simpleContent><xs:extension base="semitones"><xs:attributeGroup ref="print-style"/><xs:attribute name="plus-minus" type="yes-no"/></xs:extension></xs:simpleContent></xs:complexType>