/usr/share/X11/xkb/symbols from Ubuntu 16.04 LTS

pc

default  partial alphanumeric_keys modifier_keys
xkb_symbols "pc105" {

    key <ESC>  {	[ Escape		]	};

    // The extra key on many European keyboards:
    key <LSGT> {	[ less, greater, bar, brokenbar ] };

    // The following keys are common to all layouts.
    key <BKSL> {	[ backslash,	bar	]	};
    key <SPCE> {	[ 	 space		]	};

    include "srvr_ctrl(fkey2vt)"
    include "pc(editing)"
    include "keypad(x11)"

    key <BKSP> {	[ BackSpace, BackSpace	]	};

    key  <TAB> {	[ Tab,	ISO_Left_Tab	]	};
    key <RTRN> {	[ Return		]	};

    key <CAPS> {	[ Caps_Lock		]	};
    key <NMLK> {	[ Num_Lock 		]	};

    key <LFSH> {	[ Shift_L		]	};
    key <LCTL> {	[ Control_L		]	};
    key <LWIN> {	[ Super_L		]	};

    key <RTSH> {	[ Shift_R		]	};
    key <RCTL> {	[ Control_R		]	};
    key <RWIN> {	[ Super_R		]	};
    key <MENU> {	[ Menu			]	};

    // Beginning of modifier mappings.
    modifier_map Shift  { Shift_L, Shift_R };
    modifier_map Lock   { Caps_Lock };
    modifier_map Control{ Control_L, Control_R };
    modifier_map Mod2   { Num_Lock };
    modifier_map Mod4   { Super_L, Super_R };

    // Fake keys for virtual<->real modifiers mapping:
    key <LVL3> {	[ ISO_Level3_Shift	]	};
    key <MDSW> {	[ Mode_switch 		]	};
    modifier_map Mod5   { <LVL3>, <MDSW> };

    key <ALT>  {	[ NoSymbol, Alt_L	]	};
    include "altwin(meta_alt)"

    key <META> {	[ NoSymbol, Meta_L	]	};
    modifier_map Mod1   { <META> };

    key <SUPR> {	[ NoSymbol, Super_L	]	};
    modifier_map Mod4   { <SUPR> };

    key <HYPR> {	[ NoSymbol, Hyper_L	]	};
    modifier_map Mod4   { <HYPR> };
    // End of modifier mappings.

    key <OUTP> { [ XF86Display ] };
    key <KITG> { [ XF86KbdLightOnOff ] };
    key <KIDN> { [ XF86KbdBrightnessDown ] };
    key <KIUP> { [ XF86KbdBrightnessUp ] };
};

hidden partial alphanumeric_keys
xkb_symbols "editing" {
    key <PRSC> {
	type= "PC_ALT_LEVEL2",
	symbols[Group1]= [ Print, Sys_Req ]
    };
    key <SCLK> {	[  Scroll_Lock		]	};
    key <PAUS> {
	type= "PC_CONTROL_LEVEL2",
	symbols[Group1]= [ Pause, Break ]
    };
    key  <INS> {	[  Insert		]	};
    key <HOME> {	[  Home			]	};
    key <PGUP> {	[  Prior		]	};
    key <DELE> {	[  Delete		]	};
    key  <END> {	[  End			]	};
    key <PGDN> {	[  Next			]	};

    key   <UP> {	[  Up			]	};
    key <LEFT> {	[  Left			]	};
    key <DOWN> {	[  Down			]	};
    key <RGHT> {	[  Right		]	};
};

srvr_ctrl

// Actions which control the server's behavior.

partial keypad_keys function_keys
xkb_symbols "xfree86" {
    include "keypad(operators)"
    include "srvr_ctrl(fkey2vt)"
};

partial function_keys
xkb_symbols "fkey2vt" {

    key <FK01> {
	type="CTRL+ALT",
	symbols[Group1]= [ F1, F1, F1, F1, XF86_Switch_VT_1 ]
    };

    key <FK02> {
	type="CTRL+ALT",
	symbols[Group1]= [ F2, F2, F2, F2, XF86_Switch_VT_2 ]
    };

    key <FK03> {
	type="CTRL+ALT",
	symbols[Group1]= [ F3, F3, F3, F3, XF86_Switch_VT_3 ]
    };

    key <FK04> {
	type="CTRL+ALT",
	symbols[Group1]= [ F4, F4, F4, F4, XF86_Switch_VT_4 ]
    };

    key <FK05> {
	type="CTRL+ALT",
	symbols[Group1]= [ F5, F5, F5, F5, XF86_Switch_VT_5 ]
    };

    key <FK06> {
	type="CTRL+ALT",
	symbols[Group1]= [ F6, F6, F6, F6, XF86_Switch_VT_6 ]
    };

    key <FK07> {
	type="CTRL+ALT",
	symbols[Group1]= [ F7, F7, F7, F7, XF86_Switch_VT_7 ]
    };

    key <FK08> {
	type="CTRL+ALT",
	symbols[Group1]= [ F8, F8, F8, F8, XF86_Switch_VT_8 ]
    };

    key <FK09> {
	type="CTRL+ALT",
	symbols[Group1]= [ F9, F9, F9, F9, XF86_Switch_VT_9 ]
    };

    key <FK10> {
	type="CTRL+ALT",
	symbols[Group1]= [ F10, F10, F10, F10, XF86_Switch_VT_10 ]
    };

    key <FK11> {
	type="CTRL+ALT",
	symbols[Group1]= [ F11, F11, F11, F11, XF86_Switch_VT_11 ]
    };

    key <FK12> {
	type="CTRL+ALT",
	symbols[Group1]= [ F12, F12, F12, F12, XF86_Switch_VT_12 ]
    };
};

partial function_keys keypad_keys
xkb_symbols "no_srvr_keys" {

    key.type="TWO_LEVEL";

    key <FK01> { [ F1, F1 ]	};
    key <FK02> { [ F2, F2 ]	};
    key <FK03> { [ F3, F3 ]	};
    key <FK04> { [ F4, F4 ]	};
    key <FK05> { [ F5, F5 ]	};
    key <FK06> { [ F6, F6 ]	};
    key <FK07> { [ F7, F7 ]	};
    key <FK08> { [ F8, F8 ]	};
    key <FK09> { [ F9, F9 ]	};
    key <FK10> { [ F10, F10 ]	};
    key <FK11> { [ F11, F11 ]	};
    key <FK12> { [ F12, F12 ]	};

    key <KPDV> { [ KP_Divide,	KP_Divide	] };
    key <KPMU> { [ KP_Multiply,	KP_Multiply	] };
    key <KPSU> { [ KP_Subtract,	KP_Subtract	] };
    key <KPAD> { [ KP_Add,	KP_Add		] };
};

partial function_keys
xkb_symbols "grab_debug" {

    key <FK11> {
	type="CTRL+ALT",
	symbols[Group1]= [ F11, F11, F11, F11, XF86LogGrabInfo ]
    };

    key <FK12> {
	type="CTRL+ALT",
	symbols[Group1]= [ F12, F12, F12, F12, XF86LogWindowTree ]
    };

};