Check for canonicalization issues -www and non-www domains.

检查www和非www域名的规范问题。

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Canonicalization creates a standard representation of XML, addressing issues like the tag representation, attribute ordering, namespace declaration, expansion and ordering, and white space handling.

规范化创建了一个标准的XML表示，用来解决诸如标记表示法、属性分类、名称空间声明、扩展和分类以及空白空间的处理等问题。

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