default partial xkb_types "default" {

    // Some types that are necessary
    // for a full implementation of
    // a PC-compatible keyboard.

    virtual_modifiers  Alt, LevelThree;

    type "PC_ALT_LEVEL2" {
	modifiers = Alt;
	map[None] = Level1;
	map[Alt] = Level2;
	level_name[Level1] = "Base";
	level_name[Level2] = "Alt";
    };

    type "PC_SUPER_LEVEL2" {
	modifiers = Mod4;
	map[None] = Level1;
	map[Mod4] = Level2;
	level_name[Level1] = "Base";
	level_name[Level2] = "Super";
    };

    type "PC_CONTROL_LEVEL2" {
	modifiers = Control;
	map[None] = Level1;
	map[Control] = Level2;
	level_name[Level1] = "Base";
	level_name[Level2] = "Control";
    };

    type "CTRL+ALT" {
	modifiers = Shift + LevelThree + Control + Alt;
	map[None] = Level1;
	map[Shift] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Control+Alt] = Level5;
	preserve[Shift] = Shift;
	preserve[Shift+LevelThree] = Shift;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "AltGr";
	level_name[Level4] = "Shift AltGr";
	level_name[Level5] = "Ctrl+Alt";
    };

};