buf.append(url).append("#:~:");
            for (int i = 0; i < textFragmentSize && i < textFragments.length; i++) {
                buf.append(textFragments[i].toURLString()).append('&');
            }
            return buf.toString();
        }
        return url;
    }

    protected String appendPDFSearchWord(final Map<String, Object> document, final String url) {