<simpleType name="CodeNavaidServiceBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="VOR" />
                <enumeration value="DME" />
                <enumeration value="NDB" />
                <enumeration value="TACAN" />
                <enumeration value="MKR" />
                <enumeration value="ILS" />
                <enumeration value="ILS_DME" />
                <enumeration value="MLS" />
                <enumeration value="MLS_DME" />
                <enumeration value="VORTAC" />
                <enumeration value="VOR_DME" />
                <enumeration value="NDB_DME" />
                <enumeration value="TLS" />
                <enumeration value="LOC" />
                <enumeration value="LOC_DME" />
                <enumeration value="NDB_MKR" />
                <enumeration value="DF" />
                <enumeration value="SDF" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeNavaidServiceBaseType
• aixm:CodeNavaidServiceType
• aixm:type