MSG

<xs:element name="MSG">
  <xs:simpleType>
    <xs:restriction base="xs:string">
      <xs:enumeration value="SUCCESSFULLY TRANSMITTED"/>
      <xs:enumeration value="EMPTY ZIP"/>
      <xs:enumeration value="CORRUPTED ZIP"/>
      <xs:enumeration value="INCOMPLETE DELIVERY"/>
      <xs:enumeration value="OTHER"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>