代理使得通过节点导航，在层次的各个位置更新信息，以及立即提交所有的变更非常简单。
The proxy makes it very simple to navigate through the nodes, update information at various places in the hierarchy, and then commit all of the changes at once.
使用一条来自单个位置的命令，管理员可以创建新节点，跨越整个网格传播所需的Data Definition Language (DDL)到所有需要位置。
With one command from a single location, administrators can create new nodes and propagate the required Data Definition Language (DDL) across the grid to all the necessary locations.
实际上，这意味着在查看一个元素的子节点，而该字节点又是一个Text节点时，可以在一次调用中得到文档中这个位置上的所有文本。
In practice, this means that when you look at the child node of an element and it's a text node, you can get all the text that is at that position in the document in one call.
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