public bool PrepareXML(string timeInUse = null)
        {
            List <string> dataPointsInUse;

            if (timeInUse != null)
            {
                dataPointsInUse = new List <string> {
                    timeInUse
                };
                dataPointsInUse = GetDataPointsInUse(dataPointsInUse, "xmlElement", "xmlXPath");
            }
            else
            {
                dataPointsInUse = GetDataPointsInUse("xmlElement", "xmlXPath");
            }

            if (dataPointsInUse.Count == 0)
            {
                return(true);
            }

            XmlProcessor xmlProcessor = new XmlProcessor();

            try {
                dataRecords = xmlProcessor.GetRecords(dataFile, dataRestURL, repeatingElement, dataSourceFileOrURL, dataPointsInUse, xmlToString, node);
            } catch (Exception ex) {
                sourceLogger.Error(ex, "Error retrieving XML data ");
                return(false);
            }

            return(true);
        }