xkb_types {

    type "ONE_LEVEL" {
        modifiers= none;
    };
    type "TWO_LEVEL" {
        modifiers= Shift;
        map[Shift]= Level2;
    };
    type "ALPHABETIC" {
        modifiers= Shift+Lock;
        map[Shift]= Level2;
        map[Lock]= Level3;
        preserve[Lock]= Lock;
    };
    type "KEYPAD" {
        modifiers= Shift;
        map[Shift]= Level2;
        map[none]= Level1;
    };
    type "VARIES WITH WINDOWS" {
        modifiers= Mod4;
        level_name[Level1]= "Base";
        level_name[Level2]= "Windows";
    };
};