Network Working Group Glenn Parsons
Internet Draft James Rafferty
Expires in six months September 22, 1997
Tag Image File Format (TIFF) - image/tiff-f
MIME Sub-type Registration
<draft-ietf-fax-tiff-f-reg-00.txt>
Status of this Memo
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Overview
This document describes the registration of the MIME sub-type
image/tiff-f. The baseline encoding is defined by [TIFF-F].
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 image/tiff-f September 22, 1997
1. Abstract
This document describes the registration of the MIME sub-type
image/tiff-f. The baseline encoding is defined by [TIFF].
2. TIFF-F Definition
The Application F of TIFF (Tag Image File Format) is defined in
detail <draft-ietf-fax-tiff-04.txt>. The intended usage of this
application content is for bi-level facsimile images.
3. MIME Definition for TIFF-F
3.1 image/tiff-f
The image/tiff-f sub-type is defined to contain only TIFF-F fax
content as defined in [TIFF-F]. It is recommended that applications
which read and writeTIFF-F encoded fax images use this MIME content
type. Applications can then uniquely identify the contents as a
TIFF-F image.
3.2 image/tiff
The image/tiff sub-type previously defined in RFC 1528 as containing
TIFF 5.0 encoded image data was redefined in [TIFFREG] 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.
TIFF-F is a derivative of TIFF and as a result is a valid encoding
for this content. Applications may choose to use this more generic
content type for TIFF-F image data if the unique identification of
TIFF-F data is not important.
The image/tiff-f MIME content type is functionally equivalent to
"image/tiff;application=f", where application is an optional
parameter. The image/tiff-f content type permits TIFF-F image data
to be uniquely identified using a MIME type and subtype, so that the
application parameter (i.e. application=f) is not needed in this
case.
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Internet Draft image/tiff-f September 22, 1997
4. IANA Registration
To: ietf-types@iana.org
Subject: Registration of Standard MIME media type image/tiff-f
MIME media type name: image
MIME subtype name: tiff-f
Required parameters: none
Optional parameters: none
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) - Application F is defined in
<draft-ietf-fax-tiff-04.txt>.
Applications which use this media type:
Imaging, fax, messaging and multi-media
Additional information:
Note that the same file identifiers as TIFF are recommended
for use with TIFF-F.
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
Person & email address to contact for further information:
Glenn W. Parsons
Glenn.Parsons@Nortel.ca
Parsons, Rafferty Expires 03/22/98 [Page 3]
Internet Draft image/tiff-f September 22, 1997
James Rafferty
Jrafferty@worldnet.att.net
Intended usage: COMMON
Change controller:
James Rafferty
5. Authors' Addresses
Glenn W. Parsons
Northern Telecom
P.O. Box 3511, Station C
Ottawa, ON K1Y 4H7
Canada
Phone: +1-613-763-7582
Fax: +1-613-763-2697
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-F] G. Parsons and J. Rafferty, " Tag Image File Format (TIFF)
- Application F", <draft-ietf-fax-tiff-04.txt>, September 1997.
[TIFFREG] G. Parsons, J. Rafferty and S. Zilles, "Tag Image File
Format (TIFF) - image/tiff: MIME Sub-type Registration ", Work
In Progress, <draft-ietf-fax-tiff-reg-02.txt>, September, 1997.
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