doc.add("segment", metadata.get(Nutch.SEGMENT_NAME_KEY));
// add digest, used by dedup
doc.add("digest", metadata.get(Nutch.SIGNATURE_KEY));
final Parse parse = new ParseImpl(parseText, parseData);
try {
// extract information from dbDatum and pass it to
// fetchDatum so that indexing filters can use it
final Text url = (Text) dbDatum.getMetaData().get(Nutch.WRITABLE_REPR_URL_KEY);
if (url != null) {