Writes a namespace declaration attribute.

写入命名空间宣告属性。

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Most W3C specifications call it a namespace declaration rather than an attribute, and it's a best practice to observe the difference in conversation.

大多数W3C规范把它称为名称空间声明，而不是属性，而且观察对话中的差异是最佳实践。

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The XSLT in Listing 41 copies text, element, and attribute nodes in the source XML document, but namespace nodes and the DOCTYPE declaration are omitted.

清单41中的XSLT复制源xml文档中的文本、元素和属性节点，但是忽略名称空间节点和DOCTYPE声明。

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