还有，对每个应用程序层重复的开发可能会包含一些适当的模式及最佳实践。
Also, iterative development of each application layer fosters the application of appropriate patterns and best practices.
U BL技术协会开发作为一个抽象层的Genericode，用它来解决每当代码变化时模式的更新(参考参考资料中链接了解更多信息)。
The UBL technical committee developed Genericode as an abstraction layer to resolve updating the schema every time code changed (see Resources for a link to more information).
“自下而上” 方法假设已经有数据库表模式，而需要根据表模式开发一个对象层和对象关系映射。
The “bottom up" approach assumes you already have database table schema and need to develop an object layer and object relational mapping from the table schema.
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