Multi-storey Distributed System Based on XML

Aiming at the disadvantage of traditional, this paper presents close coupling Web application system model based on a J2EE and loose couplingmulti-storey distributed system, which separates business logic layer from database layer. It implements system configuration, data transmission, inter-layerinterface with XML technology. A data transfer strategies between XML documents and heterogeneous data source is discussed and implemented. Thearchitecture is applied to the Web application system——MEDLOG.