* @param parentElement Parent element
*/
public PerfData(final Node node, final Element parentElement) {
super(parentElement);
final PerfDataSupport parent = (PerfDataSupport) parentElement;
this.label = getNodeAttribute(node, "label", parent.getVar());
this.var = parent.getVar();
this.critical = getNodeAttribute(node, "critical", parent.getCritical());
this.warning = getNodeAttribute(node, "warning", parent.getWarning());
this.min = getNodeAttribute(node, "min");
this.max = getNodeAttribute(node, "max");
this.unit = getNodeAttribute(node, "unit");
}