fn:namespace-uri-for-prefix

Returns the namespace URI corresponding to a given prefix, using the namespaces that are in scope for a given element.

namespace-uri-for-prefix($prefix as xs:string?, $element as element()) ➔ xs:anyURI?

Arguments
	$prefix	xs:string?	The supplied prefix
	$element	element()	The element node whose in-scope namespaces are to be examined
Result		xs:anyURI?

http://www.w3.org/2005/xpath-functions