<simpleType name="CodeFinalGuidanceBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="LPV" />
                <enumeration value="LNAV_VNAV" />
                <enumeration value="LNAV" />
                <enumeration value="GLS" />
                <enumeration value="ASR" />
                <enumeration value="ARA" />
                <enumeration value="ARSR" />
                <enumeration value="PAR" />
                <enumeration value="ILS" />
                <enumeration value="ILS_DME" />
                <enumeration value="ILS_PRM" />
                <enumeration value="LDA" />
                <enumeration value="LDA_DME" />
                <enumeration value="LOC" />
                <enumeration value="LOC_BC" />
                <enumeration value="LOC_DME" />
                <enumeration value="LOC_DME_BC" />
                <enumeration value="MLS" />
                <enumeration value="MLS_DME" />
                <enumeration value="NDB" />
                <enumeration value="NDB_DME" />
                <enumeration value="SDF" />
                <enumeration value="TLS" />
                <enumeration value="VOR" />
                <enumeration value="VOR_DME" />
                <enumeration value="TACAN" />
                <enumeration value="VORTAC" />
                <enumeration value="DME" />
                <enumeration value="LP" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeFinalGuidanceBaseType
• aixm:CodeFinalGuidanceType
• aixm:guidanceSystem