This file is indexed.

/usr/share/X11/xkb/compat/pc is in xkb-data 2.16-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
default partial xkb_compatibility "pc" {

    // Sets the "Alt" virtual modifier.

    virtual_modifiers  Alt;

    setMods.clearLocks= True;
    interpret Alt_L+Any {
	virtualModifier= Alt;
	action = SetMods(modifiers=modMapMods);
    };

    interpret Alt_R+Any {
	virtualModifier= Alt;
	action = SetMods(modifiers=modMapMods);
    };
};