<xs:attribute name="EMD_TypeValue" use="optional">
    <xs:annotation>
        <xs:documentation source="Description" xml:lang="en">The EMD type value.</xs:documentation>
    </xs:annotation>
    <xs:simpleType>
        <xs:restriction base="xs:string">
            <xs:enumeration value="1 - Standalone" />
            <xs:enumeration value="2 - Associated to a Flight" />
            <xs:enumeration value="3 - Standalone No Flight Ticket Associated" />
            <xs:enumeration value="4 - Carrier Directed No EMD" />
            <xs:enumeration value="5 - Eticket" />
        </xs:restriction>
    </xs:simpleType>
</xs:attribute>