<simpleType name="CodeCommunicationModeBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="HF" />
                <enumeration value="VHF" />
                <enumeration value="VDL1" />
                <enumeration value="VDL2" />
                <enumeration value="VDL4" />
                <enumeration value="AMSS" />
                <enumeration value="ADS_B" />
                <enumeration value="ADS_B_VDL" />
                <enumeration value="HFDL" />
                <enumeration value="VHF_833" />
                <enumeration value="UHF" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeCommunicationModeBaseType
• aixm:CodeCommunicationModeType
• aixm:communicationEquipment
• aixm:mode