/usr/share/doc/ is in libexpat-ocaml-dev 0.9.1+debian1-7build8.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libexpat-ocaml-dev/
/usr/share/doc/libexpat-ocaml-dev/README
/usr/share/doc/libexpat-ocaml-dev/changelog.Debian.gz
/usr/share/doc/libexpat-ocaml-dev/copyright
/usr/share/doc/libexpat-ocaml-dev/html/
/usr/share/doc/libexpat-ocaml-dev/html/api/
/usr/share/doc/libexpat-ocaml-dev/html/api/Expat.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_attributes.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_class_types.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_classes.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_exceptions.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_extensions.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_methods.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_module_types.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_modules.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_types.html
/usr/share/doc/libexpat-ocaml-dev/html/api/index_values.html
/usr/share/doc/libexpat-ocaml-dev/html/api/style.css
/usr/share/doc/libexpat-ocaml-dev/html/api/type_Expat.html
/usr/share/doc-base/libexpat-ocaml-dev.doc-base.apiref