<xs:attribute name="RangePosition" use="optional">
    <xs:annotation>
        <xs:documentation xml:lang="en">Specifies whether this is first or last passenger name number in a range.</xs:documentation>
    </xs:annotation>
    <xs:simpleType>
        <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="First">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Indicates that the surname and given name reference numbers represent the first passenger name in a range of passengers to be ticketed. </xs:documentation>
                </xs:annotation>
            </xs:enumeration>
            <xs:enumeration value="Last">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Indicates that the surname and given name reference numbers represent the last passenger name in a range of passengers to be ticketed.</xs:documentation>
                </xs:annotation>
            </xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
</xs:attribute>