if (processor == null) {
processor = new DocumentProcessor();
}
final Set linkedContributionIds = new HashSet();
ProcessorHandler[] linkFinder = new ProcessorHandler[] {
new ValidationHandler(getRequiredAttributes()),
new ProcessorHandler() {
public short handle(UAElement element, String id) {
if (element instanceof Link) {
Link link = (Link)element;
String toc = link.getToc();