Demand analysis, website structure design, function analysis and design, database design will be shown step by step at the part of design description.
在设计描述部分逐步讲述项目的需求分析，网站架构设计，功能分析与设计，数据库设计，其中有相应的示意图和表格直观的表达设计意图；
Record-based logical models define the overall logical structure of the database as well as higher level description of its implementation.
基于记录的逻辑模型定义数据库的整个逻辑结构以及实现的更高级描述。
A schema is a description of the entire database structure that is used by the database software to maintain the database.
模式是整个数据结构的一个描述，模式通过数据软件被使用，用来维护数据库。
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