2008.01.08 15:00 "[Tiff] Tag handling in LibTiff - past, present and future", by

2008.02.01 15:46 "Re: [Tiff] TIFF T.30 vs TIFF Class F", by Bob Friesenhahn

While I won't dispute Joris as a greater authority on what the TIFF specs have to say about this, I would suggest that if you are planning to send this to an actual FAX machine, the ITU spec (T.30) is going to have to take precedence (assuming you have a current, error free copy of that).

Ultimately the current ITU T specs refer to RFC 2301 (http://www.ietf.org/rfc/rfc2301.txt) so that is the document I will take as "gospel".

Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/