Node[] getElementsByTagNameNS(String namespaceURI, String localName);
namespaceURI
The unique identifier of the namespace of the desired elements, or "*" to match all namespaces.
localName
The local name of the desired elements, or "*" to match any local name.
A read-only array (technically, a NodeList) of all Element nodes in the document tree that have the specified namespace and local name.
This method works just like getElementsByTagName( ) except that it searches for elements by namespace and name. It is useful only with XML documents that use namespaces.