/usr/share/java/basex.jar is in basex 8.2.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/basex/basex/debian/basex-debian.jar
/usr/share/java/../maven-repo/org/basex/basex/debian/basex-debian.jar