7Franklin M, Halevy A, Maier D. From databases to dataspaces: A new abstraction for information management [ C ]//ACM Sigmod Record. New York : ACM ,2005:27 - 33.
8Heimbigner D, McLeod D. A federated architecture for information management[ C ]//ACM Transactions on Information Systems. New York : ACM, 1985:253 - 278.
9Malhotra Y. Knowledge management for the new world of business [ J] . Journal for Quality & Participation, 1998,21 (4) :58 - 60.
