With the schema information, you can greatly simplify your program and more importantly, you can improve the productivity of your applications.
有了模式信息后，您可以大大简化程序，更重要的是，可以提高应用程序的生产率。
2
In addition, you can only load the schema documents used in applications statically; a program is not allowed to dynamically load and use schemas on the fly.
此外，您只能静态地加载应用程序使用的模式文档；程序不允许动态地加载和使用模式。
3
Data stored in rows and columns with a schema allow the meaning of the data to be understood by a computer program.