stack.getFirst().appendChild(element);
        stack.addFirst(element);
    }

    public Element pop() {
        Element element = stack.removeFirst();
        if (emptyPara(element)) {
            element.getParentNode().removeChild(element);
        }
        return element;
    }

    private boolean emptyPara(Element element) {
        if (!element.getTagName().equals("para")) {
            return false;
        }

                                    break;
                                }
                            }
                        }
                    }

                    parent = parent.getParentNode();
                }
            }

            if (StringUtil.isNotBlank(namespace)) {
                return namespace;
            }
            return "http://crawler.codelibs.org/namespace/" + prefix;