def _get_measures(self, et):
        """
        Get a list of measures in <continuous> or <SurveyOptions> section
        """
        list_of_measures = []
        for tag in et.findall("option"):
            if tag.attrib.get("value", "true") == "true":
                list_of_measures.append(tag.attrib["name"])
        return list_of_measures