This file is indexed.

/usr/share/X11/xkb/semantics/default is in xkb-data 2.5-1ubuntu1.

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

The actual contents of the file can be viewed below.

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default xkb_semantics "default" {

xkb_types		{ include "default" 	};
xkb_compatibility	{ include "default"	};

};