/usr/share/entity-map/0.1.0/ISOlat1.2rtf is in linuxdoc-tools 0.9.71-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/entity-map/0.1.0/ISOlat1.2ab
/usr/share/entity-map/0.1.0/ISOlat1.2ab