/lib/udev/keymaps/oqo-model2 is in udev 175-0ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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0x8E wlan 0xF0 switchvideomode 0xF1 mute 0xF2 volumedown 0xF3 volumeup