/usr/share/X11/xkb/compat/caps is in xkb-data 2.23.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 | partial xkb_compatibility "caps_lock" {
// Keysym Caps_Lock locks the Lock modifier.
// With this definition, the keysym Caps_Lock can be used without binding
// the whole key to a real modifier. This is essential when you don't
// want to use Caps_Lock on the first level.
// This should not have any compatibility issues when used together with
// other layouts which don't utilize this capability.
interpret Caps_Lock {
action = LockMods(modifiers = Lock);
};
};
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