/usr/share/caribou/ is in libcaribou-common 0.4.21-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/caribou/layouts/
/usr/share/caribou/layouts/fullscale/
/usr/share/caribou/layouts/fullscale/de.xml
/usr/share/caribou/layouts/fullscale/us.xml
/usr/share/caribou/layouts/scan/
/usr/share/caribou/layouts/scan/us.xml
/usr/share/caribou/layouts/tablet/
/usr/share/caribou/layouts/tablet/de.xml
/usr/share/caribou/layouts/tablet/us.xml
/usr/share/caribou/layouts/touch/
/usr/share/caribou/layouts/touch/ara.xml
/usr/share/caribou/layouts/touch/de.xml
/usr/share/caribou/layouts/touch/fr.xml
/usr/share/caribou/layouts/touch/il.xml
/usr/share/caribou/layouts/touch/us.xml