XXXX 电子报税系统项目建议书 1998 年 3 月目 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.......................................................................................42.1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.........................................................................................72.4.2ISP 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........................................
