<simpleType name="CodeVerticalStructureMaterialBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="ADOBE_BRICK" />
                <enumeration value="ALUMINIUM" />
                <enumeration value="BRICK" />
                <enumeration value="CONCRETE" />
                <enumeration value="FIBREGLASS" />
                <enumeration value="GLASS" />
                <enumeration value="IRON" />
                <enumeration value="MASONRY" />
                <enumeration value="METAL" />
                <enumeration value="MUD" />
                <enumeration value="PLANT" />
                <enumeration value="PRESTRESSED_CONCRETE" />
                <enumeration value="REINFORCED_CONCRETE" />
                <enumeration value="SOD" />
                <enumeration value="STEEL" />
                <enumeration value="STONE" />
                <enumeration value="TREATED_TIMBER" />
                <enumeration value="WOOD" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeVerticalStructureMaterialBaseType
• aixm:CodeVerticalStructureMaterialType
• aixm:visibleMaterial