/usr/share/liblouisxml/ is in liblouisxml-data 2.4.0-5build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/liblouisxml/lbx_files/
/usr/share/liblouisxml/lbx_files/ThML.sem
/usr/share/liblouisxml/lbx_files/Workbook.sem
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/usr/share/liblouisxml/lbx_files/canonical.cfg
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