One document matched: draft-ietf-fax-tiff-reg-01.txt

Differences from draft-ietf-fax-tiff-reg-00.txt

  Network Working Group                                    Glenn Parsons
  Internet Draft                                          James Rafferty
  Expires in six months                                    July 29, 1997


               Tag Image File Format (TIFF) - image/tiff
                      MIME Sub-type Registration
                                   
                   <draft-ietf-fax-tiff-reg-01.txt>
                                   
  Status of this Memo
  
  This document is an Internet Draft.  Internet Drafts are working
  documents of the Internet Engineering Task Force (IETF), its Areas, 
  and its Working Groups.  Note that other groups may also distribute 
  working documents as Internet Drafts.
  
  Internet Drafts are valid for a maximum of six months and may be 
  updated, replaced, or obsoleted by other documents at any time.  It 
  is inappropriate to use Internet Drafts as reference material or to 
  cite them other than as a "work in progress".
  
  To learn the current status of any Internet-Draft, please check the 
  "1id-abstracts.txt" listing contained in the Internet-Drafts Shadow 
  Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), 
  munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or 
  ftp.isi.edu (US West Coast).
  
  Overview
  
  This document describes the registration of the MIME sub-type 
  image/tiff.  The baseline encoding is defined by [TIFF].
  
  Internet Fax Working Group
  
  This document is a product of the IETF Internet Fax Working Group.  
  All comments on this document should be forwarded to the email 
  distribution list at <ietf-fax@imc.org>.
  


     Internet Draft                  TIFF-F                   July 29, 1997


 1. Abstract
  
  
  This document describes the registration of the MIME sub-type
  image/tiff.  The baseline encoding is defined by [TIFF].  This 
  document refines an earlier sub-type registration in RFC 1528 
  [TPC.INT].
  
  
 2. TIFF Definition
  
  TIFF (Tag Image File Format) Revision 6.0 is defined in detail by 
  Adobe in [TIFF].  The documentation can be obtained from Adobe at:
  
  Adobe Developers Association
  Adobe Systems Incorporated
  345 Park Avenue
  San Jose, CA 95110-2704
  
  Phone: +1-408-536-6000
  Fax:   +1-408-537-6000
  
  A copy of this specification can also be found in:
  ftp://ftp.adobe.com/pub/adobe/devrelations/devtechnotes/pdffiles/
  tiff6.pdf
  
  While a brief scope and feature description is provided in this 
  section as background information, the reader is directed to the 
  original TIFF specification [TIFF] to obtain complete feature and 
  technical details.
  
  
 2.1 TIFF Scope
  
  TIFF describes image data that typically comes from scanners, frame 
  grabbers, and paint- and photo-retouching programs. TIFF is not a 
  printer language or page description language. The purpose of TIFF
  is to describe and store raster image data.  A primary goal of TIFF 
  is to provide a rich environment within which applications can 
  exchange image data. This richness is required to take advantage of 
  the varying capabilities of scanners and other imaging devices.  
  Though TIFF is a rich format, it can easily be used for simple 
  scanners and applications as well because the number of required 
  fields is small.
  
  
 2.2 TIFF Features
  
  Some of the features of TIFF (from [TIFF]) are:
  
   - TIFF is capable of describing bilevel, grayscale, palette-color, 
     and full-color image data in several color spaces.


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   - TIFF includes a number of compression schemes that allow 
     developers to choose the best space or time tradeoff for their 
     applications.
  
   - TIFF is designed to be extensible and to evolve gracefully as new 
     needs arise.
  
   - TIFF allows the inclusion of an unlimited amount of private or 
     special-purpose information.
  
  
  3. MIME Definition
  
  3.1 image/tiff
  
  The image/tiff sub-type was previously defined in RFC 1528 as 
  containing TIFF 5.0 encoded image data.  This document re-defines 
  the original image/tiff definition to refer to TIFF 6.0 encoded 
  image data.  The TIFF 6.0 specification [TIFF] is a cleaner document 
  and is compatible with previous TIFF 5.0 encoded image data.  
  
  
 3.2 Application parameter
  
  There are cases where it may be useful to identify the application 
  applicable to the content of an image/tiff body.  As a result, an 
  optional "application" parameter is defined for image/tiff to 
  identify the TIFF application of the encoded image data, if it is 
  known.  No values are defined in this document.
  
  Example:
  
  		Content-type: image/tiff; application=foo
  
  There is no default value for application, as the absence of the 
  application parameter indicates that the encoded TIFF image is 
  Baseline TIFF or that it is not necessary to identify the 
  application.   It is up to the implementation to determine the 
  application (if necessary) and present the image to the user.
  
  
 4.  IANA Registration
  
       To: ietf-types@iana.org
       Subject: Registration of Standard MIME media type image/tiff
  
       MIME media type name: image
  
       MIME subtype name: tiff
  
       Required parameters: none


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       Optional parameters: application
  
         There is no format specified for the value of this parameter 
         in addition to that specified by [MIME1].  Various 
         applications of TIFF may define values as required.  There 
         is no default value for application, as the absence of the 
         application parameter indicates that the encoded TIFF image 
         is Baseline TIFF or that it is not necessary to identify the 
         application.  It is up to the implementation to determine 
         the application (if necessary) and present the image to the 
         user.
  
       Encoding considerations: Binary or Base-64 generally preferred
  
       Security considerations: none
  
       Interoperability considerations: 
  
         The ability of implementations to handle all the defined 
         applications of TIFF may not be ubiquitous.  As a result, 
         the absence of the application parameter would force 
         implementations to decode and attempt to display the encoded 
         TIFF image data in order to determine if it could actually 
         be viewed.
  
       Published specification:
  
         TIFF (Tag Image File Format) is defined in:
            TIFF (TM) Revision 6.0 - Final - June 3, 1992
  
         Adobe Developers Association
         Adobe Systems Incorporated
         345 Park Avenue
         San Jose, CA 95110-2704
         
         Phone: +1-408-536-6000
         Fax:   +1-408-537-6000
         
         A copy of this specification can be found in:
         ftp://ftp.adobe.com/pub/adobe/devrelations/devtechnotes/
         pdffiles/tiff6.pdf
  
       Applications which use this media type: 
  
         Imaging, fax, messaging and multi-media
  
       Additional information:
  
         Magic number(s):   
              II (little-endian):  49 49 42 00 hex
              MM (big-endian):     4D 4D 00 42 hex
         File extension(s): .TIF
         Macintosh File Type Code(s): TIFF


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       Person & email address to contact for further information:
  
         Glenn W. Parsons
         Glenn.Parsons@Nortel.ca 
  
         James Rafferty
         Jrafferty@worldnet.att.net
  
       Intended usage: COMMON
  
       Author/Change controller:
  
         James Rafferty
  
 5. Authors' Addresses
  
  Glenn W. Parsons
  Nortel Technology
  P.O. Box 3511, Station C
  Ottawa, ON  K1Y 4H7
  Canada
  Phone: +1-613-763-7582 
  Fax:   +1-613-763-8385
  Email: Glenn.Parsons@Nortel.ca 
  
  James Rafferty
  Human Communications
  12 Kevin Drive
  Danbury, CT 06811-2901
  USA
  Phone: +1-203-746-4367
  Fax:   +1-203-746-4367
  Email: Jrafferty@worldnet.att.net
  
  
 6. References
  
  [MIME1] N. Freed and N. Borenstein,  "Multipurpose Internet Mail 
       Extensions (MIME) Part One: Format of Internet Message Bodies", 
       RFC 2045, Innosoft, First Virtual, Nov 1996
  [MIME4] N. Freed and N. Borenstein,  "Multipurpose Internet Mail 
       Extensions (MIME) Part Four: Registration Procedures", RFC 
       2048, Innosoft, First Virtual, Nov 1996.
  [TIFF] Adobe Developers Association, TIFF (TM) Revision 6.0 - Final, 
       June 3, 1992.
  [TPC.INT] C. Malamud, M. Rose, "Principles of Operation for the 
       TPC.INT Subdomain:  Remote Printing -- Technical Procedures", 
       RFC 1528, 10/06/1993
  
  
  



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