/usr/share/doc/ is in docbook-utils 0.6.14-1.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/docbook-utils/backends/
/usr/share/docbook-utils/backends/dvi
/usr/share/docbook-utils/backends/html
/usr/share/docbook-utils/backends/man
/usr/share/docbook-utils/backends/pdf
/usr/share/docbook-utils/backends/ps
/usr/share/docbook-utils/backends/rtf
/usr/share/docbook-utils/backends/tex
/usr/share/docbook-utils/backends/texi
/usr/share/docbook-utils/backends/txt
/usr/share/docbook-utils/frontends/
/usr/share/docbook-utils/frontends/docbook
/usr/share/docbook-utils/docbook-utils.dsl
/usr/share/doc/docbook-utils/
/usr/share/doc/docbook-utils/html/
/usr/share/doc/docbook-utils/html/api.html
/usr/share/doc/docbook-utils/html/backend-spec.html
/usr/share/doc/docbook-utils/html/docbook2man.html
/usr/share/doc/docbook-utils/html/docbook2texi.html
/usr/share/doc/docbook-utils/html/fdl.html
/usr/share/doc/docbook-utils/html/frontend-spec.html
/usr/share/doc/docbook-utils/html/helpers.html
/usr/share/doc/docbook-utils/html/index.html
/usr/share/doc/docbook-utils/html/introduction.html
/usr/share/doc/docbook-utils/html/intro-jw.html
/usr/share/doc/docbook-utils/html/intro-sgmldiff.html
/usr/share/doc/docbook-utils/html/jw.html
/usr/share/doc/docbook-utils/html/sgmldiff.html
/usr/share/doc/docbook-utils/README
/usr/share/doc/docbook-utils/TODO
/usr/share/doc/docbook-utils/README.Debian
/usr/share/doc/docbook-utils/TODO.Debian
/usr/share/doc/docbook-utils/copyright
/usr/share/doc/docbook-utils/changelog.Debian.gz
/usr/share/doc-base/docbook-utils