其概念是非常简单的：通过使用整个软件栈(操作系统、应用、配置数据等等)的虚拟映像来避免安装与配置上的冲突。

The concept is simple: avoid all installation and configuration hassles by using a virtual image of an entire software stack: operating system, application (s), configuration data, etc.

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与设备类似，应用程序和所有先决中间件和操作系统软件都是预安装和预配置的。

Like an appliance, the application and all prerequisite middleware and operating system software is all pre-installed and configured.

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首先通过安装联邦引擎来创建一个联邦系统，然后配置该联邦系统，以便与数据源通信。

You create a federated system by first installing the federated engine, then configuring it to communicate with the data sources. There are four basic federated objects.

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