Dafang Zhuang Wen Yuan Jiyuan Liu Dongsheng Qiu Tao Ming The Unstructured Data Sharing System for Natural resources and Environment Science Data of the Chinese Academy of Science. 770-778 2007 6 Data Science Journal http://www.jstage.jst.go.jp/article/dsj/6/0/6_S770/_article db/journals/datascience/datascience6.html#ZhuangYLQM07