使用样例就能清楚地看出任何给定文档类型中哪个元素是根元素，并为每个元素提供典型数据的例子。
Using samples makes it clear which element is the root element in any given document type and provides examples of typical data for each element.
如果您仔细斟酌这篇文章的服务样例的话，这个例子就会显得有些不足。
If you think about the service example in this article, it might seem rather silly.
即使该场景没有包含可供本文下载的样例代码，但是执行此类查询的方法与我们在前面例子中讨论的方法是相同的。
Even though this scenario isn't included in the sample code available for download with this article, the approach to executing such a query is the same as we discussed in previous examples.
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