Keyword arguments:
            namespace -- namespace of element to create
            qname -- qualified name of new element

def createElementNS(self, namespace, qname):
        '''
        Keyword arguments:
            namespace -- namespace of element to create
            qname -- qualified name of new element
        '''
        document = self._getOwnerDocument()
        node = document.createElementNS(namespace, qname)
        return ElementProxy(self.sw, node)