@Override
  protected boolean verifyChildRange(final XmlTagChild first, final XmlTagChild last) {
    final Language language = first.getLanguage();

    if (first != last ||
        Language.findInstance(HTMLLanguage.class).equals(language) ||
        Language.findInstance(XHTMLLanguage.class).equals(language)
      ) {
      return false;
    }

    final XmlTag parentTag = first.getParentTag();
    return parentTag != null && isAvailableOnDescriptor(parentTag.getDescriptor());
  }
@Override
  protected boolean verifyChildRange(final XmlTagChild first, final XmlTagChild last)