1 概述

1.1 编写目的

本文档的编写目的是：详细定义×××××软件的总体功能；给出系统的结构设计，作为过程设计和程序编写的依据。

1.2 参考资料

包括：

a.　　项目来源；

b.　　本文档中引用到的规范和资料等；

c.　　列出这些规范和资料的作者、编号、标题、发表日期、出版单位或资料来源。

1.3 术语和缩写词*

列出本文档中用到的专门术语的定义和缩写词，缩写词要给出中文译名和英文全称，常用的不需要定义。

2　　需求概述

2.1　　目标与需求

概述系统的特性和需求，扩充软件需求说明中的信息，给出增加的细节，详尽地指出对软件需求说明中有关特性和需求做出的变更。

2.2 环境描述

描述运行软件系统所需的软、硬件环境；描述开发软件系统所需的软、硬件环境。

2.3 条件和限制

描述可能影响设计方案形成及实施的条件和限制。

-prepared an overview 1.1 purpose of this document is prepared : detailed definition x x x software overall function; given the structural design, As a process and procedures for the preparation of the design basis. 1.2 reference include : a. source projects; B. This document quoted the norms and information; c. presents information on these norms and the author of the serial number, title, date of publication, the publishing unit or source of information. 1.3 Terms and Abbreviations * List of the documents used in the definition of the jargon and abbreviations words, acronym given to the Chinese translation and English full name, not the common definition. Demand 2.1 outlined two goals and needs outlined the features and system requirements, the software needs to expand the narrative o