actuate

<xs:attribute name="actuate" use="required">
  <xs:simpleType>
    <xs:restriction base="xs:token">
      <xs:enumeration value="onload"/>
      <xs:enumeration value="onrequest"/>
      <xs:enumeration value="other"/>
      <xs:enumeration value="none"/>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>