'Builds a qualified name from a (ns_url, localname) pair'

def _qname(self, name):

    if name[0]:
        if ('http://www.w3.org/XML/1998/namespace' == name[0]):
            return ('xml:' + name[1])
        prefix = self._current_context[name[0]]
        if prefix:
            return ((prefix + ':') + name[1])
    return name[1]
