Version maintenance in web-based maintenance for XML materialized view

The queries for XML data of web application are usually affected by the disadvantages of the network,such as the limited transmitting speed and so on.In order to reduce the overhead of the network communication for maintaining the consistency between XML materialized views and their data source,a web-based incremental maintenance solution for XML materialized views is provided.The solution generates programs to maintain views according to multiple query requests from clients and the update information about changes to the data source,using code migrating of the programs instead of querying XML views once again,therefore it reduces the capacity of communication effectively.The version maintenance control capability is discussed in detail,which serves as the core part in the incremental maintenance process,to maintain the update programs of views used to maintain the update at different time.This capability meets the requirement of maintaining various materialized views from multiple users well.A framework of incremental main-tenance for the materialized views is presented.