日程表主菜单是一个简单的 VXML 文件，它所提供的主要选项将作为应用程序其余部分的开始点。
The main calendar menu is a simple VXML file that provides the main options as a starting point for the rest of the application.
最近的应用程序已将XML作为其主要的文件格式，而比较旧的应用程序依赖于其它格式，因此您最终常常得到新旧格式混合的数据。
Recent applications have adopted XML as their primary file format but older applications rely on other formats, so you often end up with a mixture of data in new and old formats.
这种方法的主要价值在于控制应用程序对文件系统的访问。
The primary value of this approach is to control file system access by applications.
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