}
public void readChartElements(Element root) throws MaltChainedException {
NodeList chartElem = root.getElementsByTagName("chartelement");
for (int i = 0; i < chartElem.getLength(); i++) {
ChartElement chartElement = new ChartElement();
chartElement.read((Element)chartElem.item(i), this);
chartElements.put(((Element)chartElem.item(i)).getAttribute("item"),chartElement);
}
}