partial modifier_keys 
xkb_symbols "meta_alt" {
    key <LALT> {	[ 	Alt_L,	Meta_L		]	};
    key <RALT> { type[Group1] = "TWO_LEVEL",
                 symbols[Group1] = [ Alt_R, Meta_R ] };
    modifier_map Mod1	{ Alt_L, Alt_R, Meta_L, Meta_R };
//  modifier_map Mod4	{};
};

// Control is mapped to the Win-keys (and the usual Ctrl keys).
partial modifier_keys 
xkb_symbols "ctrl_win" {
    key <LWIN> {	[ 	Control_L		]	};
    key <RWIN> {	[ 	Control_R		]	};
    modifier_map Control { <LWIN>, <RWIN> };
};

// Ctrl is mapped to the Alt-keys, Alt is mapped to the Win-keys,  Win is mapped to the Ctrl-keys.
partial modifier_keys 
xkb_symbols "ctrl_alt_win" {
    key <LALT> {	[ 	Control_L, Control_L		]	};
    key <RALT> { type[Group1] = "TWO_LEVEL",
                 symbols[Group1] = [ Control_R, Control_R ] };
    key <LWIN> {	[	Alt_L, Meta_L    	]	};
    key <RWIN> {	[	Alt_R, Meta_R		]	};
    modifier_map Control { <RALT>, <LALT> };
    modifier_map  Mod1 { <LWIN>, <RWIN> };
};


partial modifier_keys 
xkb_symbols "meta_win" {
    key <LALT> {	[ 	Alt_L,	Alt_L		]	};
    key <RALT> { type[Group1] = "TWO_LEVEL",
                 symbols[Group1] = [ Alt_R, Alt_R ] };
    key <LWIN> {	[ 	Meta_L			]	};
    key <RWIN> {	[ 	Meta_R			]	};
    modifier_map Mod1	{ Alt_L, Alt_R };
    modifier_map Mod4	{ <META>, Meta_L, Meta_R };
};

partial modifier_keys 
xkb_symbols "left_meta_win" {
    key <LALT> {	[ 	Alt_L,	Alt_L		]	};
    key <LWIN> {	[ 	Meta_L			]	};
    modifier_map Mod1	{ Alt_L };
    modifier_map Mod4	{ <META>, Meta_L };
};

partial modifier_keys 
xkb_symbols "hyper_win" {
    key <LWIN> {	[ 	Hyper_L			]	};
    key <RWIN> {	[ 	Hyper_R			]	};
    modifier_map Mod4	{ Hyper_L, Hyper_R };
};

// Use Menu for the menu key
partial modifier_keys 
xkb_symbols "menu" {
    key <MENU> {	[ 	Menu		]	};
};

// Layout for Tux key caps with additional right Alt key
partial modifier_keys 
xkb_symbols "alt_super_win" {
    key <LALT> {        [       Alt_L,  Meta_L          ]       };
    key <RWIN> {        [       Alt_R,  Meta_R          ]       };
    key <LWIN> {        [       Super_L                 ]       };
    key <MENU> {        [       Super_R                 ]       };
    modifier_map Mod1   { Alt_L, Alt_R, Meta_L, Meta_R };
    modifier_map Mod4   { Super_L, Super_R };
};

partial modifier_keys 
xkb_symbols "swap_lalt_lwin" {
    key <LALT> { type[Group1] = "ONE_LEVEL",
                 symbols[Group1] = [ Super_L ] };
    key <LWIN> {	[	Alt_L,	Meta_L		]	};
};