ruby - XML Namespace issue with Nokogiri -

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i have following xml:

<body>   <hello xmlns='http://...'>      <world>yes</world>   </hello> </body>

when load nokogiri xml document, , call document.at_css "world", receive nil back. when remove namespace hello, works perfectly. know can call document.remove_namespaces!, why it not work namespace?

because nokogiri requires register xml namespaces querying within (read more xml namespaces). should still able query element if specify namespace when calling at_css. see exact usage, check out css method documentation. should end looking this:

document.at_css "world", 'namespace_name' => 'namespace uri'

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