XX电子报税系统项目建议书目录1.引言........................................................................................................31.1背景说明.....................................................................................................31.2项目要求.....................................................................................................31.3参考资料.....................................................................................................31.4词语及缩写.................................................................................................31.5系统提出.....................................................................................................42.软件总体概述.......................................................................................4XXXX电子报税系统项目建议书第2页共18页2.1目标..............................................................................................................42.2系统模型.....................................................................................................62.3网络拓扑结构............................................................................................62.4系统功能.....................................................................................................62.4.1............................................................................................报税受理部分72.4.2.....................................................................................................ISP部分72.4.3..........................................................................用户部分（纳税终端）82.5性能需求.....................................................................................................82.5.1....................................................................................................数据精度82.5.2....................................................................................................时间特性83.业务详细需求............................
