# fn:namespace-uri-from-QName - XPath XQuery Reference

Returns the namespace URI part of the supplied QName.deterministiccontext-independentfocus-independentIf $arg is the empty sequence the function returns the empty sequence.Otherwise, the function returns an xs:anyURI representing the namespace URI
            part of $arg.If $arg is in no namespace, the function returns the zero-length
               xs:anyURI.fn:namespace-uri-from-QName(fn:QName("http://www.example.com/example",
                  "person"))xs:anyURI("http://www.example.com/example")