4C.W.CHUNG. DATAPLEX: An access to heterogeneous distributed databases[R]. Comm.ACM, Vol.33, No.l, 2002.
5S.ABITEBOUL, D.QUASS, J.MCHUGH, J.WLDOM, J.WIENER. The lorel query language for semistructured data. International Journal on Digital Libraries, 2002.
6Michael H.Real Time Data Warehouse:The Next Stage in Data Warehouse Evolution[].DM Review.2003
7Basu R.Challenges of Real-time Data Warehousing[].DM Review.2003
