2Liu Ling, Pu Calton, Han Wei. XWRAP: An XMLenabled wrapper construction system for web information sources [J].ACM SIGPLAN Notices, 2000, 35(10):130-145.
3McHugh J, Abiteboul S, Goldman R, et al. A database management system for semistructured data[J]. ACM SIGMOD, 1997,26(3):54-66.
4HaasL M, Miller R, Nis Wonger B, et al. Transforming heterogeneous data with database middleware[J]. IEEE Transaction on Data Engineering, 1999,22(1):31-37.