上篇文章讨论了Application Server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。
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.
抽象了数据库模式的细节，这使得改变使用的数据库、数据库设计和访问方法都对服务消费者是透明的。
It abstracts from the actual database schema, thus allowing modifying used database, database layout and access methods, transparently to service consumers.
我们还必须习惯于使我们能够成功的模式化的开发方法和使用工具来完成系统开发工作中那些复杂的工作（数据库设计和代码生成）。
We have to be much more willing to prototype our way to success and to use tools that will do complex parts of the systems development process (database design and code generation) for us.
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