<simpleType name="CodeSurfaceCompositionBaseType">
    <union>
        <simpleType>
            <restriction base="string">
                <enumeration value="ASPH" />
                <enumeration value="ASPH_GRASS" />
                <enumeration value="CONC" />
                <enumeration value="CONC_ASPH" />
                <enumeration value="CONC_GRS" />
                <enumeration value="GRASS" />
                <enumeration value="SAND" />
                <enumeration value="WATER" />
                <enumeration value="BITUM" />
                <enumeration value="BRICK" />
                <enumeration value="MACADAM" />
                <enumeration value="STONE" />
                <enumeration value="CORAL" />
                <enumeration value="CLAY" />
                <enumeration value="LATERITE" />
                <enumeration value="GRAVEL" />
                <enumeration value="EARTH" />
                <enumeration value="ICE" />
                <enumeration value="SNOW" />
                <enumeration value="MEMBRANE" />
                <enumeration value="METAL" />
                <enumeration value="MATS" />
                <enumeration value="PIERCED_STEEL" />
                <enumeration value="WOOD" />
                <enumeration value="NON_BITUM_MIX" />
            </restriction>
        </simpleType>
        <simpleType>
            <restriction base="string">
                <pattern value="OTHER(:(\w|_){1,58})?" />
            </restriction>
        </simpleType>
    </union>
</simpleType>

• CodeSurfaceCompositionBaseType
• aixm:CodeSurfaceCompositionType
• aixm:composition