]> Allow extension of the content models and the attribute lists Use this complexType to extend the minimal content model of the ruby element. Use this complexType to extend the attribute list of the ruby element. Use this complexType to extend the minimal content model of the rbc element. Use this complexType to extend the attribute list of the rbc element. Use this complexType to extend the minimal content model of the rtc element. Use this complexType to extend the attribute list of the rtc element.