<xs:simpleType name="DisplayOrderType">
    <xs:restriction base="xs:NMTOKEN">
        <xs:enumeration value="ByDepartureTime">
            <xs:annotation>
                <xs:documentation xml:lang="en">Display products by departure time</xs:documentation>
            </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="ByArrivalTime">
            <xs:annotation>
                <xs:documentation xml:lang="en">Display products by arrival time</xs:documentation>
            </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="ByJourneyTime">
            <xs:annotation>
                <xs:documentation xml:lang="en">Display products by journey time</xs:documentation>
            </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="ByPriceHighToLow">
            <xs:annotation>
                <xs:documentation xml:lang="en">AWG ToDo</xs:documentation>
            </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="ByPriceLowToHigh">
            <xs:annotation>
                <xs:documentation xml:lang="en">AWG ToDo</xs:documentation>
            </xs:annotation>
        </xs:enumeration>
    </xs:restriction>
</xs:simpleType>