<simpleType name="CodeNavigationEquipmentBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="DME" />
                <enumeration value="VOR_DME" />
                <enumeration value="DME_DME" />
                <enumeration value="TACAN" />
                <enumeration value="ILS" />
                <enumeration value="MLS" />
                <enumeration value="GNSS" />
                <enumeration value="WAAS" />
                <enumeration value="LORAN" />
                <enumeration value="INS" />
                <enumeration value="FMS" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeNavigationEquipmentBaseType
• aixm:CodeNavigationEquipmentType
• aixm:navigationEquipment