The most important thing you can do when you design a native XML database schema is to avoid the temptation to normalize the data in the same way that you do when you design a relational database.
设计原生XML数据库模式时，最重要的事情是避免使用设计关系数据库时采用的方法来规格化数据。
The structure of the XML schema may be very different from the relational schema, as the users may have very less or absolutely no control on the design of the XML schema.
XML模式的结构可能与关系模式完全不同，因为用户很少或完全不控制XML模式的设计。
No need to design or optimize a relational schema
不需要设计或优化关系模式
The structure of the XML documents, as expressed by an XML schema, could be very different from the relational schema, as the users may have less or no control of the design of XML Schema.
像XML模式所表达的一样，XML文档的结构完全不同于关系模式，因为用户对 XMLSchema的设计具有很少的控制，甚至没有控制。
The previous article discussed how Application Server and Application Developer use an XML file called Schema.dbxmi to represent a relational database schema that is mapped to an EJB design.
上篇文章讨论了ApplicationServer和Application Developer如何使用称为schema . dbxmi的XML文件来表示映射到EJB设计的关系数据库模式。
Optimization of relational schema is very important and difficult to design a database system, the ultimate goal of optimization is to construct a good relational schema for database system.
关系模式优化是关系数据库系统设计中的一个重点和难点，优化的最终目的是建立一个良好的关系模式。
Optimization of relational schema is very important and difficult to design a database system, the ultimate goal of optimization is to construct a good relational schema for database system.
关系模式优化是关系数据库系统设计中的一个重点和难点，优化的最终目的是建立一个良好的关系模式。
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