/usr/share/ is in libxstr-ocaml-dev 0.2.1-21build7.
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/usr/share/doc-base/
/usr/share/doc-base/libxstr-ocaml-dev.doc-base.apiref
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/usr/share/doc/libxstr-ocaml-dev/
/usr/share/doc/libxstr-ocaml-dev/README
/usr/share/doc/libxstr-ocaml-dev/html/
/usr/share/doc/libxstr-ocaml-dev/html/api/
/usr/share/doc/libxstr-ocaml-dev/html/api/Xstr_split.html
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/usr/share/doc/libxstr-ocaml-dev/html/api/index_values.html
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/usr/share/doc/libxstr-ocaml-dev/copyright
/usr/share/doc/libxstr-ocaml-dev/changelog.Debian.gz
/usr/share/doc/libxstr-ocaml-dev/RELEASE