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partial default xkb_types "default" {

    // Defines a type with a four-level shift, similar to the three-level
    // type used for iso9995, but it lets the Shift key behave "normally".

    virtual_modifiers LevelThree;

    type "FOUR_LEVEL" {
	modifiers = Shift+LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    type "FOUR_LEVEL_ALPHABETIC" {
	modifiers = Shift+Lock+LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[Lock]  = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock+LevelThree] =  Level4;
	map[Lock+Shift+LevelThree] =  Level3;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    type "FOUR_LEVEL_SEMIALPHABETIC" {
	modifiers = Shift+Lock+LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[Lock]  = Level2;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[Lock+LevelThree] =  Level3;
	map[Lock+Shift+LevelThree] = Level4;
	preserve[Lock+LevelThree] = Lock;
	preserve[Lock+Shift+LevelThree] = Lock;
	level_name[Level1] = "Base";
	level_name[Level2] = "Shift";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Shift Alt";
    };

    // A four-level keypad variant. The first two levels are controlled by
    // NumLock (with active shifting like in KEYPAD).  LevelThree overrides
    // this mode, with two additional shifted levels.
    type "FOUR_LEVEL_MIXED_KEYPAD" {
        modifiers = Shift+NumLock+LevelThree;
        map[None] = Level1;
        map[Shift+NumLock] = Level1;
        map[NumLock] = Level2;
        map[Shift] = Level2;
        map[LevelThree] = Level3;
        map[NumLock+LevelThree] = Level3;
        map[Shift+LevelThree] = Level4;
        map[Shift+NumLock+LevelThree] = Level4;
        level_name[Level1] = "Base";
        level_name[Level2] = "Number";
        level_name[Level3] = "Alt Base";
        level_name[Level4] = "Shift Alt";
    };

    // Base level, two shifted LevelThree levels, one Ctrl+Alt command level.
    type "FOUR_LEVEL_X" {
        modifiers = Shift+LevelThree+Control+Alt;
        map[None] = Level1;
        map[LevelThree] = Level2;
        map[Shift+LevelThree] = Level3;
        map[Control+Alt] = Level4;
        level_name[Level1] = "Base";
        level_name[Level2] = "Alt Base";
        level_name[Level3] = "Shift Alt";
        level_name[Level4] = "Ctrl+Alt";
    };

// A special type for keys used in the Serbian Latin Unicode keymap.
// It makes it possible to use all three forms of latin letters
// present in Unicode that are made up of two separate letters
// (forms like LJ, Lj, and lj; NJ, Nj, and nj; etcetera).

    type "SEPARATE_CAPS_AND_SHIFT_ALPHABETIC" {
        modifiers = Shift+Lock+LevelThree;
        map[None] = Level1;
        map[Shift] = Level2;
        map[Lock] = Level4;
        map[LevelThree] = Level3;
        map[Shift+LevelThree] = Level4;
        map[Lock+LevelThree] =  Level3;
        map[Lock+Shift+LevelThree] = Level3;
        preserve[Lock]= Lock;
        preserve[Lock+LevelThree]= Lock;
        level_name[Level1] = "Base";
        level_name[Level2] = "Shift";
        level_name[Level3] = "AltGr Base";
        level_name[Level4] = "Shift AltGr";
    };

// A key type for the German ssharp (for example), which is capitalized as SS.
// CHARACTERISTICS:
// It is FOUR_LEVEL with the exception that the fifth level is mapped to the
// Lock modifier.  If other modifiers are used, the Lock state is ignored.
// DETAILS ABOUT GERMAN:
// The capital form of ssharp (called sharp s) only exists for completely
// capitalized text, not for words at the beginning of sentences nor for
// nouns (nouns in German normally start with a captial letter).
// The ssharp key, to the right of the zero key, takes this into account
// and has a questionmark mapped to Shift-ssharp since normally no capital
// version is needed.
// When typing with active CapsLock, this key type is needed to
// output two capital letters S because this is the only German key
// whose capital letter is not the same as the one typed with Shift.

    type "FOUR_LEVEL_PLUS_LOCK" {
        modifiers = Shift+Lock+LevelThree;
        map[None] = Level1;
        map[Shift] = Level2;
        map[LevelThree] = Level3;
        map[Shift+LevelThree] = Level4;
        map[Lock]  = Level5;
        map[Lock+Shift] = Level2;
        map[Lock+LevelThree] = Level3;
        map[Lock+Shift+LevelThree] = Level4;
        level_name[Level1] = "Base";
        level_name[Level2] = "Shift";
        level_name[Level3] = "Alt Base";
        level_name[Level4] = "Shift Alt";
        level_name[Level5] = "Lock";
    };
};

// This enables the four-level shifting also for the keypad.
partial xkb_types "keypad" {
    virtual_modifiers LevelThree;

    type "FOUR_LEVEL_KEYPAD" {
	modifiers = Shift+NumLock+LevelThree;
	map[None] = Level1;
	map[Shift] = Level2;
	map[NumLock] = Level2;
	map[Shift+NumLock] = Level1;
	map[LevelThree] = Level3;
	map[Shift+LevelThree] = Level4;
	map[NumLock+LevelThree] = Level4;
	map[Shift+NumLock+LevelThree] = Level3;
	level_name[Level1] = "Base";
	level_name[Level2] = "Number";
	level_name[Level3] = "Alt Base";
	level_name[Level4] = "Alt Number";
    };
};