/usr/include/ is in libcmis-dev 0.5.1-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libcmis-0.5/
/usr/include/libcmis-0.5/libcmis/
/usr/include/libcmis-0.5/libcmis/xmlserializable.hxx
/usr/include/libcmis-0.5/libcmis/exception.hxx
/usr/include/libcmis-0.5/libcmis/property-type.hxx
/usr/include/libcmis-0.5/libcmis/object.hxx
/usr/include/libcmis-0.5/libcmis/libcmis.hxx
/usr/include/libcmis-0.5/libcmis/folder.hxx
/usr/include/libcmis-0.5/libcmis/document.hxx
/usr/include/libcmis-0.5/libcmis/object-type.hxx
/usr/include/libcmis-0.5/libcmis/repository.hxx
/usr/include/libcmis-0.5/libcmis/property.hxx
/usr/include/libcmis-0.5/libcmis/rendition.hxx
/usr/include/libcmis-0.5/libcmis/xml-utils.hxx
/usr/include/libcmis-0.5/libcmis/session-factory.hxx
/usr/include/libcmis-0.5/libcmis/oauth2-data.hxx
/usr/include/libcmis-0.5/libcmis/session.hxx
/usr/include/libcmis-0.5/libcmis/allowable-actions.hxx
/usr/include/libcmis-c-0.5/
/usr/include/libcmis-c-0.5/libcmis-c/
/usr/include/libcmis-c-0.5/libcmis-c/object-type.h
/usr/include/libcmis-c-0.5/libcmis-c/error.h
/usr/include/libcmis-c-0.5/libcmis-c/folder.h
/usr/include/libcmis-c-0.5/libcmis-c/property.h
/usr/include/libcmis-c-0.5/libcmis-c/object.h
/usr/include/libcmis-c-0.5/libcmis-c/property-type.h
/usr/include/libcmis-c-0.5/libcmis-c/oauth2-data.h
/usr/include/libcmis-c-0.5/libcmis-c/types.h
/usr/include/libcmis-c-0.5/libcmis-c/session.h
/usr/include/libcmis-c-0.5/libcmis-c/vectors.h
/usr/include/libcmis-c-0.5/libcmis-c/allowable-actions.h
/usr/include/libcmis-c-0.5/libcmis-c/document.h
/usr/include/libcmis-c-0.5/libcmis-c/session-factory.h
/usr/include/libcmis-c-0.5/libcmis-c/libcmis-c.h
/usr/include/libcmis-c-0.5/libcmis-c/repository.h
/usr/include/libcmis-c-0.5/libcmis-c/rendition.h