<xs:simpleType name="rehearsal-enclosure"><xs:annotation><xs:documentation>The rehearsal-enclosure type describes the shape and presence / absence of an enclosure around rehearsal text.</xs:documentation></xs:annotation><xs:restriction base="xs:token"><xs:enumeration value="square"/><xs:enumeration value="circle"/><xs:enumeration value="none"/></xs:restriction></xs:simpleType>