addFieldRule(name, xpath);
        fieldPrunedRuleMap.put(name, isPruned);
    }

    /**
     * Sets the URL conversion map for transforming URLs.
     *
     * @param convertUrlMap the map of regex patterns to replacement strings
     */
    public void setConvertUrlMap(final Map<String, String> convertUrlMap) {

 * mapping and Punycode encoding.
 *
 * In order to avoid confusion and discourage phishing attacks, [IDNA Mapping][idna] transforms
 * names to avoid confusing characters. This includes basic case folding: transforming shouting
 * `SQUARE.COM` into cool and casual `square.com`. It also handles more exotic characters. For
 * example, the Unicode trademark sign (™) could be confused for the letters "TM" in