{
sig.setSignatureFormat(mapSignatureFormat(n));
sig.setAuthor(author);
sig.setTimestamp(timestamp);
appendRtd(sig, n, 0);
}
sig.setSignatureFormat(mapSignatureFormat(n));
if (author != null)
sig.setAuthor(author);
if (timestamp != null)
sig.setTimestamp(timestamp);
appendRtd(sig, n, 0);
}