mei:mei_data.BOOLEAN

<xs:simpleType name="mei_data.BOOLEAN">
  <xs:restriction base="xs:token">
    <xs:enumeration value="true">
      <xs:annotation>
        <xs:documentation/>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="false">
      <xs:annotation>
        <xs:documentation/>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>