The semintones type is a number representing semitones, used for chromatic alteration. A value of -1 corresponds to a flat and a value of 1 to a sharp. Decimal values like 0.5 (quarter tone sharp) may be used for microtones.
<xs:simpleType name="semitones"><xs:annotation><xs:documentation>The semintones type is a number representing semitones, used for chromatic alteration. A value of -1 corresponds to a flat and a value of 1 to a sharp. Decimal values like 0.5 (quarter tone sharp) may be used for microtones.</xs:documentation></xs:annotation><xs:restriction base="xs:decimal"/></xs:simpleType>