新闻发布系统需求分析报告1引言.........................................................................................................................................................31.1编写目的........................................................................................................................................31.2项目背景.........................................................................................................................................31.3定义.................................................................................................................................................31.4参考资料........................................................................................................................................32任务概述.................................................................................................................................................42.1目标.................................................................................................................................................42.2用户的特点.....................................................................................................................................42.3假定和约束.....................................................................................................................................43需求分析.................................................................................................................................................53.1总体需求分析.................................................................................................................................53.2功能描述.........................................................................................................................................53.2.1精度..........................................................................................................................................63.2.2时间特性要求..........................................................................................................................63.2.3灵活性......................................................................................................................................64.数据描述................................................................................................................................................74.1数据库描述.....................................................................................................................................74.2数据库关系结构.............................................................................................................................74.2.1用户注册表（ADMIN）............................................................................................................74.2.2栏目表（TYPE）......................................................................................................................94.2.3小类栏目表（BIGCLASS）......................................................................................................94.2.4内容表（NEWS）...................................................................................................................104.2.5管理用户组表（DEP）.............................................................
