partial alphanumeric_keys
xkb_symbols "cv_latin" {
    include "us(alt-intl)"
    name[Group1]= "Russia - Chuvash Latin Alphabet";

    key.type[group1]="FOUR_LEVEL";

    key        <AD02> {	[	  w,	W,    udiaeresis,       Udiaeresis ] };
    key        <AD03> { [         e,	E,        ebreve,           Ebreve ] };
    key        <AC01> { [	  a,    A,        abreve,           Abreve ] };
    key        <AC02> { [	  s,    S,      scedilla,         Scedilla ] };

    include "level3(ralt_switch)"

};