RFC 3250 (rfc3250) - Page 2 of 7


Tag Image File Format Fax eXtended (TIFF-FX) - image/tiff-fx MIME Sub-type Registration



Alternative Format: Original Text Document



RFC 3250                     image/tiff-fx                September 2002


3. TIFF-FX Definition

   TIFF-FX (Tag Image File Format Fax eXtended), is defined in detail by
   RFC 2301 "File Format for Internet Fax" [TIFF-FX].

   While a brief scope and feature description is provided in this
   section as background information, the reader is directed to the
   original TIFF-FX specification (File Format for Internet Fax) to
   obtain complete feature and technical details.

3.1 TIFF-FX Scope

   This document defines a TIFF-based file format specification for
   enabling standardized messaging-based fax over the Internet.  It
   specifies the TIFF fields and field values required for compatibility
   with the existing ITU-T Recommendations for Group 3 black-and-white,
   grayscale and color facsimile.  TIFF has historically been used for
   handling fax image files in applications such as store-and-forward
   messaging.  Implementations that support this file format
   specification for import/export may elect to support it as a native
   format.  This document recommends a TIFF file structure that is
   compatible with low-memory and page-level streaming implementations.

   Unless otherwise noted, the current TIFF specification [TIFF] and
   selected TIFF Technical Notes [TTN1, TTN2] are the primary references
   for describing TIFF and defining TIFF fields.  This document is the
   primary reference for defining TIFF field values for fax
   applications.

3.2 TIFF-FX Features

   Some of the features of TIFF-FX are:

      -  TIFF-FX is capable of describing bilevel, grayscale, palette-
         color, full-color and mixed content image data.

      -  TIFF-FX includes a number of compression schemes that allow
         developers to choose the best space or time tradeoff for their
         applications.

      -  TIFF-FX is designed to be extensible and to evolve gracefully
         as new needs arise.









McIntyre, et. al.           Standards Track