<xs:group name="editorial-voice"><xs:annotation><xs:documentation>The editorial-voice group supports the common combination of editorial and voice information for a musical element.</xs:documentation></xs:annotation><xs:sequence><xs:group ref="footnote" minOccurs="0"/><xs:group ref="level" minOccurs="0"/><xs:group ref="voice" minOccurs="0"/></xs:sequence></xs:group>