Where do I find the authoritative list of mapping codes

[symcbean]

I have configured my xwiimote as shown below. But on the KEY_LEFT, KEY_RIGHT, KEY_PAGEUP, KEY_PAGEDOWN mappings seem to work (xev reports no other events, but I can see them in xwiishow).

...
Option "MapLeft" 	"KEY_LEFT"
Option "MapRight" 	"KEY_RIGHT"
Option "MapUp" 		"KEY_PAGEUP"
Option "MapDown"  	"KEY_PAGEDOWN"

Option "MapA"		"BTN_1"
Option "MapB"		"BTN_3"
Option "MapPlus" 	"KEY_VOLUMEUP"
Option "MapMinus"	"KEY_VOLUMEDOWN"
Option "MapHome"	"KEY_FN_FN11"
Option "MapOne"		"KEY_1"
Option "MapTwo" 	"KEY_2"
...

Where should I be looking for an authoritative list of the event names?