New file.

README.md

+# Ruimoku-Retro (XML version)
+
+XML version of the retrospective input data of the Bibliography of
+Oriental Studies (1934〜1980).
+
+1934〜1980年度版東洋学文献類目の遡及入力データの XML 版。
+
+
+
+## License
+
+This package is free software (open data); you can redistribute it
+and/or modify it under the terms of [![CC BY-SA
+4.0](https://i.creativecommons.org/l/by-sa/4.0/88x31.png) Creative
+Commons Attribution-ShareAlike 4.0 International (CC BY-SA
+4.0)](http://creativecommons.org/licenses/by-sa/4.0/) or the GNU
+General Public License as published by the Free Software Foundation;
+either version 2, or (at your option) any later version.
+
+This package is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this package; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.