在典型的分层架构中，提供平台虚拟化的层称为hypervisor(有时称为虚拟机管理程序或VMM)。

In a typical layered architecture, the layer that provides for the platform virtualization is called the hypervisor (sometimes called the virtual machine monitor, or VMM).

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基本上，当一个SDO客户机需要检索数据时，它使用DMS来请求数据图，DMS负责管理对数据源的访问，并根据接收到的信息来创建一个图，通常这个图是一个分层的树结构，其中包含了几个数据对象。

Basically, when an SDO client needs to retrieve data, it USES the DMS to require a data graph. The DMS manages the data source access and creates a graph with the information received.

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例如，分层体系结构、模型-视图-控制器(Model View Controller, mvc)、客户机-服务器甚至SOA。

Think, for example, of layered architectures, model view controller (MVC), client-server, or even SOA.

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