/usr/share/xml/docutils/catalog is in docutils-common 0.12+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | PUBLIC "+//IDN docutils.sourceforge.net//DTD Docutils Generic//EN//XML" docutils.dtd
DTDDECL "+//IDN docutils.sourceforge.net//DTD Docutils Generic//EN//XML" /usr/share/xml/declaration/xml.dcl
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