def xpathNextNamespace(self, cur):
        """Traversal function for the "namespace" direction the
          namespace axis contains the namespace nodes of the context
          node; the order of nodes on this axis is
          implementation-defined; the axis will be empty unless the
          context node is an element  We keep the XML namespace node
           at the end of the list. """
        if cur is None: cur__o = None
        else: cur__o = cur._o
        ret = libxml2mod.xmlXPathNextNamespace(self._o, cur__o)
        if ret is None:raise xpathError('xmlXPathNextNamespace() failed')
        __tmp = xmlNode(_obj=ret)
        return __tmp