http://www.perlmonks.org?node_id=1025119


in reply to No bonus points for you :-)
in thread LibXML, XPath and Namespaces

That wouldn't be a valid XPath. XPath "foo" matches child elements named "foo" in the null namespace. There's no way to specify a default namespace for nodetests in an XPath.

Furthermore, gt is a prefix, not a namespace. http://www.govtalk.gov.uk/CM/envelope is the namespace in this case. gt is completely arbitrary, meaningless.