使用XPath在命名空间中选择元素
我想在具有给定名称空间(前缀)的文档中选择最顶层的元素.
I want to select the topmost element in a document that has a given namespace (prefix).
更具体地说:我有一些XML文档，它们以/html/body(在XHTML名称空间中)开头，或者以一个特定名称空间中的几个元素之一开头.我实际上想剥离/html/body并只返回正文内容或整个根命名空间元素.
More specifically: I have XML documents that either start with /html/body (in the XHTML namespace) or with one of several elements in a particular namespace. I effectively want to strip out /html/body and just return the body contents OR the entire root namespaced element.
In XPath 2.0 and XQuery 1.0 you can test against the namespace prefix using the in-scope-prefixes() function in a predicate. e.g.
//*[in-scope-prefixes(.)='html']
如果您不能使用v2，则可以在XPath 1.0中使用 namespace-uri ()函数来测试名称空间本身. 例如
If you cant use v2, in XPath 1.0 you can use the namespace-uri() function to test against the namespace itself. e.g.
//*[namespace-uri()='http://www.w3c.org/1999/xhtml']