In mobile computing environments, materialized views are used to download a
subset of data from central servers to mobile clients, with periodic refreshes from
the central servers and propagation of updates by clients back to the central
servers.

数据计算环境下的物化视图
在移动计算环境中,移动客户端可以使用物化视图从中央服务器下载一个数据的子集,还可以定期地从中央服务器取得最新数据,
并将移动客户端的数据修改传回中央服务器.