features.add(new NumberOfWordsStemmedFeature());
features.add(new NumberOfCharsBeforeFeature());
features.add(new NumberOfCharsStemmedFeature());
features.add(new ElementDepthFeature());
features.add(new ItemNumberInParentFeature());
features.add(new NumberOfChildrenFeature());
features.add(new NumberOfDescendentsFeature());
features.add(new IsTheOnlyChildFeature());
features.add(new ChildrenDepthFeature());
features.add(new SectionDepthFeature());
features.add(new NumberOfSiblingsFeature());