public void printClassificationFilter(ClassificationFilter f) throws IOException, RaplaException {
   openTag("rapla:classificationfilter");
   att("dynamictype", f.getType().getKey());
   closeTag();
   for (Iterator<? extends ClassificationFilterRule> it = f.ruleIterator(); it.hasNext(); ) {
     ClassificationFilterRule rule = it.next();
     printClassificationFilterRule(rule);
   }
   closeElement("rapla:classificationfilter");
 }