它帮助您根据需要灵活机动地使用工具操作EGL资源，提供自己的界面及利用应用程序编程接口的功能。
It gives you the flexibility to provide your own interface and make use of the API functionality, as needed, within your tools to manipulate EGL resources.
如果需要管理和操纵XML数据，XQuery就是程序库、应用程序编程或者服务栈所提供的功能规范。
Whenever XML data needs to be managed and manipulated, XQuery is a specification for functions that a library or an application programming or service stack can provide.
使用这种方法，您可以利用由应用程序暴露的应用程序编程接口(API)来访问旧系统封装的数据和功能。
With this approach, you leverage the application programming interfaces (APIs) exposed by your applications to access both the data and the functionality encapsulated by legacy systems.
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