1. Metadata Research Center, College of Computing and Informatics, Drexel University, 3675 Market St 10th floor,Philadelphia, PA 19104, USA
2. Australian Research Data Commons, Melbourne, Victoria 3145, Australia
3. Shanghai Library (Institute of Scientific and Technical Information of Shanghai), No. 1555 Huaihai Middle Road Xuhui District, Shanghai 200031, China
4. Department of Library, Information, and Archive, School of Economic Management, University of Chinese Academy of Sciences, 33 Beisihuanxilu, Haidian District, Beijing 100190, China
5. Data Intelligence, National Science Library, Chinese Academy of Sciences, 33 Beisihuanxilu, Haidian District, Beijing 100190, China