<simpleType name="CodeUnitBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="ACC" />
                <enumeration value="ADSU" />
                <enumeration value="ADVC" />
                <enumeration value="ALPS" />
                <enumeration value="AOF" />
                <enumeration value="APP" />
                <enumeration value="APP_ARR" />
                <enumeration value="APP_DEP" />
                <enumeration value="ARO" />
                <enumeration value="ATCC" />
                <enumeration value="ATFMU" />
                <enumeration value="ATMU" />
                <enumeration value="ATSU" />
                <enumeration value="BOF" />
                <enumeration value="BS" />
                <enumeration value="COM" />
                <enumeration value="FCST" />
                <enumeration value="FIC" />
                <enumeration value="GCA" />
                <enumeration value="MET" />
                <enumeration value="MWO" />
                <enumeration value="NOF" />
                <enumeration value="OAC" />
                <enumeration value="PAR" />
                <enumeration value="RAD" />
                <enumeration value="RAFC" />
                <enumeration value="RCC" />
                <enumeration value="RSC" />
                <enumeration value="SAR" />
                <enumeration value="SMC" />
                <enumeration value="SMR" />
                <enumeration value="SRA" />
                <enumeration value="SSR" />
                <enumeration value="TAR" />
                <enumeration value="TWR" />
                <enumeration value="UAC" />
                <enumeration value="UDF" />
                <enumeration value="UIC" />
                <enumeration value="VDF" />
                <enumeration value="WAFC" />
                <enumeration value="ARTCC" />
                <enumeration value="FSS" />
                <enumeration value="TRACON" />
                <enumeration value="MIL" />
                <enumeration value="MILOPS" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeUnitBaseType
• aixm:CodeUnitType
• aixm:type