/usr/share/common-lisp/source/cxml/ is in cl-cxml 20110619-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/source/cxml/catalog.dtd
/usr/share/common-lisp/source/cxml/cxml.asd
/usr/share/common-lisp/source/cxml/dom/
/usr/share/common-lisp/source/cxml/dom/dom-builder.lisp
/usr/share/common-lisp/source/cxml/dom/dom-impl.lisp
/usr/share/common-lisp/source/cxml/dom/dom-sax.lisp
/usr/share/common-lisp/source/cxml/dom/package.lisp
/usr/share/common-lisp/source/cxml/klacks/
/usr/share/common-lisp/source/cxml/klacks/klacks-impl.lisp
/usr/share/common-lisp/source/cxml/klacks/klacks.lisp
/usr/share/common-lisp/source/cxml/klacks/package.lisp
/usr/share/common-lisp/source/cxml/klacks/tap-source.lisp
/usr/share/common-lisp/source/cxml/test/
/usr/share/common-lisp/source/cxml/test/domtest.lisp
/usr/share/common-lisp/source/cxml/test/misc.lisp
/usr/share/common-lisp/source/cxml/test/utf8domtest.diff
/usr/share/common-lisp/source/cxml/test/xmlconf-base.diff
/usr/share/common-lisp/source/cxml/test/xmlconf.lisp
/usr/share/common-lisp/source/cxml/xml/
/usr/share/common-lisp/source/cxml/xml/atdoc-configuration.lisp
/usr/share/common-lisp/source/cxml/xml/catalog.lisp
/usr/share/common-lisp/source/cxml/xml/package.lisp
/usr/share/common-lisp/source/cxml/xml/recoder.lisp
/usr/share/common-lisp/source/cxml/xml/sax-handler.lisp
/usr/share/common-lisp/source/cxml/xml/sax-proxy.lisp
/usr/share/common-lisp/source/cxml/xml/sax-tests/
/usr/share/common-lisp/source/cxml/xml/sax-tests/event-collecting-handler.lisp
/usr/share/common-lisp/source/cxml/xml/sax-tests/package.lisp
/usr/share/common-lisp/source/cxml/xml/sax-tests/tests.lisp
/usr/share/common-lisp/source/cxml/xml/space-normalizer.lisp
/usr/share/common-lisp/source/cxml/xml/split-sequence.lisp
/usr/share/common-lisp/source/cxml/xml/unparse.lisp
/usr/share/common-lisp/source/cxml/xml/util.lisp
/usr/share/common-lisp/source/cxml/xml/xml-name-rune-p.lisp
/usr/share/common-lisp/source/cxml/xml/xml-parse.lisp
/usr/share/common-lisp/source/cxml/xml/xmlns-normalizer.lisp
/usr/share/common-lisp/source/cxml/xml/xmls-compat.lisp