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9. MIME content-type image/tiff

   [TIFF-REG] describes the registration of the MIME content-type
   image/tiff to refer to TIFF encoded image data. When transported by
   MIME, the TIFF content defined by this document must be encoded
   within an image/tiff content type. In addition, an optional
   "application" parameter is defined for image/tiff to identify a
   particular application's subset of TIFF and TIFF extensions for the
   encoded image data, if it is known. Typically, this would be used to
   assist the recipient in dispatching a suitable rendering package to
   handle the display or processing of the image file.

9.1. Refinement of MIME content-type image/tiff for Facsimile Applications

   Since this document defines facsimile specific profiles of TIFF, it
   is useful to note an appropriate application parameter for the
   image/tiff MIME content-type.

   The two values of the image/tiff application parameter as defined for
   facsimile are shown below, separated by a comma:

       faxbw, faxcolor

   The "faxbw" application parameter is suitable for use by applications
   that can process one or more TIFF for facsimile profiles or subsets
   used for the encoding of black and white facsimile data.

   The "faxcolor" application parameter is suitable for use by
   applications that can process one or more TIFF for facsimile profiles
   or subsets that can be used for the encoding of black and white, AND
   color facsimile data.

   Since this document defines several profiles of TIFF for facsimile,
   the following rules should be followed when setting the application
   parameter value. For TIFF image data which is encoded for the
   profiles of TIFF for Facsimile that support black-and-white image
   data (Profiles S, F or J), applications which use one of these
   profiles or a subset should set the value of the application
   parameter to "faxbw". For TIFF image data which is encoded for the
   defined profiles of TIFF for Facsimile that support color image data
   (Profiles C, L or M), as well as black-and-white image data,
   applications which use one of these profiles or a subset should set
   the value of the application parameter to "faxcolor".

   An example of the use of the image/tiff MIME Content-type with the
   application parameter set with the value 'faxbw' follows:

       Content-type: image/tiff; application=faxbw

   In this example, use of this parameter value will enable applications
   to identify the content as being within a profile or subset of TIFF
   for Facsimile that is suitable for encoding black and white image
   data, Before attempting to process the image data.

   In a similar respect, an example of the image/tiff MIME Content-type
   with the application parameter setting suitable for handling a color
   subset or profile of TIFF for facsimile is shown below:

       Content-type: image/tiff; application=faxcolor

ZVON > RFC Repository > RFC 2301
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