A namespace can be declared on any element, allowing it to be recognized within the sub-tree defined by that element and all its children.
可以对任何元素声明名称空间，从而允许在由该元素及其所有子元素定义的子树内识别它。
For example, let's say the high-level company namespace is denoncourt, the first sub-level is retail, and the third level has functional names, as shown in Listing 4.
例如，假设高层名称空间是公司名denoncourt，第一个子级别是retail，第二个子级别是功能名称，见清单4。
Normal canonicalization: When a sub-part of the XML is serialized, the ancestor element's context and all namespace declarations and attributes in the xmlns namespace are included.
常规规范化：当序列化XML的一部分时，祖先元素的上下文和所有的名称空间声明以及xmlns 名称空间中的属性都被包括进来。
One record -- for Helen Rakai -- comes close because it contains a root element with a sub-element that belongs to the namespace specified.
Helen Rakai 的那条记录也没有返回，因为它包含一个根元素，该元素有一个 子元素，后者属于指定的名称空间。
One record -- for Helen Rakai -- comes close because it contains a root element with a sub-element that belongs to the namespace specified.
Helen Rakai 的那条记录也没有返回，因为它包含一个根元素，该元素有一个 子元素，后者属于指定的名称空间。
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