rafaelff [1] filed a deletion request for docbook-xml-dtd [2]: This package is a partially duplicates the package 'docbook-xml' without file conflicts, with the aggravation of messing the XML catalog set being the latter. This AUR package provides docbook DTD v4.4, which is already provided by docbook-xml, although the files are installed in another directory. However, the main problem of this package is that, once installed, it messes completely the search path of other versions of DTD already provided by 'docbook-xml'. For example, installing this AUR package makes impossible to build gtk-doc, which reports DTD v4.3 is not installed, even though 'docbook-xml' provides it. Besides, it stores XML catalog in /etc/xml/docbook, which is deprecated for 'docbook-xml' - this official package stores in /etc/xml/catalog and /etc/xml/docbook-xml Anyway, this package dangerously breaks docbook's XML search path. Please delete. [1] https://aur.archlinux.org/account/rafaelff/ [2] https://aur.archlinux.org/pkgbase/docbook-xml-dtd/