def on_security_data_node(self, node):
        """process a securityData node - FIXME: currently not handling relateDate node """
        sid = XmlHelper.get_child_value(node, 'security')
        farr = node.getElement('fieldData')
        dmap = defaultdict(list)
        for i in range(farr.numValues()):
            pt = farr.getValue(i)
            [dmap[f].append(XmlHelper.get_child_value(pt, f, allow_missing=1)) for f in ['date'] + self.fields]

        if not dmap:
            frame = pd.DataFrame(columns=self.fields)
        else:
            idx = dmap.pop('date')
            frame = pd.DataFrame(dmap, columns=self.fields, index=idx)
            frame.index.name = 'date'
        self.response.on_security_complete(sid, frame)
process a securityData node - FIXME: currently not handling relateDate node