/usr/share/xml/gnome/xslt/docbook/ is in gnome-doc-utils 0.20.10-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xml/gnome/xslt/docbook/common/
/usr/share/xml/gnome/xslt/docbook/common/db-chunk.xsl
/usr/share/xml/gnome/xslt/docbook/common/db-common.xsl
/usr/share/xml/gnome/xslt/docbook/common/db-label.xsl
/usr/share/xml/gnome/xslt/docbook/common/db-title.xsl
/usr/share/xml/gnome/xslt/docbook/common/db-xref.xsl
/usr/share/xml/gnome/xslt/docbook/html/
/usr/share/xml/gnome/xslt/docbook/html/db2html-autotoc.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-bibliography.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-block.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-callout.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-classsynopsis.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-cmdsynopsis.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-css.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-division.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-ebnf.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-footnote.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-funcsynopsis.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-index.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-info.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-inline.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-l10n.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-list.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-media.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-qanda.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-refentry.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-suppressed.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-table.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-title.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html-xref.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2html.xsl
/usr/share/xml/gnome/xslt/docbook/html/db2xhtml.xsl
/usr/share/xml/gnome/xslt/docbook/omf/
/usr/share/xml/gnome/xslt/docbook/omf/db2omf.xsl
/usr/share/xml/gnome/xslt/docbook/utils/
/usr/share/xml/gnome/xslt/docbook/utils/chunks.xsl
/usr/share/xml/gnome/xslt/docbook/utils/credits.xsl
/usr/share/xml/gnome/xslt/docbook/utils/figures.xsl
/usr/share/xml/gnome/xslt/docbook/utils/graphics.xsl
/usr/share/xml/gnome/xslt/docbook/utils/ids.xsl