/usr/share/gtk-doc/ is in libiptcdata-doc 1.0.4-3ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libiptcdata/
/usr/share/gtk-doc/html/libiptcdata/ch01.html
/usr/share/gtk-doc/html/libiptcdata/ch02.html
/usr/share/gtk-doc/html/libiptcdata/ch03.html
/usr/share/gtk-doc/html/libiptcdata/home.png
/usr/share/gtk-doc/html/libiptcdata/index.html
/usr/share/gtk-doc/html/libiptcdata/index.sgml
/usr/share/gtk-doc/html/libiptcdata/iptc-about.html
/usr/share/gtk-doc/html/libiptcdata/iptc-commandline.html
/usr/share/gtk-doc/html/libiptcdata/iptc-i18n.html
/usr/share/gtk-doc/html/libiptcdata/iptc-libjpeg.html
/usr/share/gtk-doc/html/libiptcdata/iptc-overview.html
/usr/share/gtk-doc/html/libiptcdata/left.png
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-data.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-dataset.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-jpeg.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-log.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-mem.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-tag.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata-utils.html
/usr/share/gtk-doc/html/libiptcdata/libiptcdata.devhelp2
/usr/share/gtk-doc/html/libiptcdata/right.png
/usr/share/gtk-doc/html/libiptcdata/style.css
/usr/share/gtk-doc/html/libiptcdata/up.png