kimgio: One library for 2 file types

[Marc Mutz]

On Wednesday 18 December 2002 20:27, Michael Ritzert wrote:
<snip>
> Mimetype=image/j2k
<snip>

This mime type doesn't exist. Please don't use it.

>From draft-singer-jp2-01.txt (which expired a year ago!):

4.1 Still Image Registration

   The image/jp2 content-type refers to all of the profiles and
   extensions that build on JPEG 2000 [ISO-JPEG2000-1] encoded image
   data. The file format is also defined in [ISO-JPEG2000-1], Annex I.
   The recommended file suffix is "jp2"

   To: ietf-types at iana.org
   Subject: Registration of Standard MIME media type image/jp2

MIME media type name:              image
MIME subtype name:                 jp2
<snip>
Interoperability considerations:   The ability of implementations to
                                   handle all the defined applications
                                   (or profiles within applications) of
                                   JPEG 2000 may not be ubiquitous. As a
                                   result, implementations may decode
                                   and attempt to display the encoded
                                   JPEG 2000 image data only to
                                   determine that the image cannot be
                                   rendered either partially or in full.
                                   It is intended to register further
                                   mime types to handle the additional
                                   capabilities present in [ISO-
                                   JPEG2000-2], [ISO-JPEG2000-3], [ISO-
                                   JPEG2000-4] and any further parts of
                                   the standard that might be created in
                                   future.
<snip>
Magic number(s):                   12 byte string: X'0000 000C 6A50 2020
                                   0D0A 870A' (for all JPEG-2000 family
                                   files)
File extension(s):                 jp2 and jpg2 are both declared at
                                   http://www.nist.gov/nics/; jp2 is
                                   preferred

and

4.2 Extended Still Image Registration

   The image/jpx content-type refers to all of the profiles and
   extensions that build on JPEG 2000 [ISO-JPEG2000-2] encoded image
   data. The file format is also defined in [ISO-JPEG2000-2], Annex M.
   The recommended file suffix is "jpf"

   To: ietf-types at iana.org
   Subject: Registration of Standard MIME media type image/jpx

MIME media type name:              image
MIME subtype name:                 jpx
<snip>
Interoperability considerations:   The ability of implementations to
                                   handle all the defined applications
                                   (or profiles within applications) of
                                   JPEG 2000 may not be ubiquitous. As a
                                   result, implementations may decode
                                   and attempt to display the encoded
                                   JPEG 2000 image data only to
                                   determine that the image cannot be
                                   rendered either partially or in full.
                                   It is intended to register further
                                   mime types to handle the additional
                                   capabilities present in profiles
                                   registered with ISO and any further
                                   parts of the standard that might be
                                   created in future.
<snip>
Magic number(s):                   12 byte string: X'0000 000C 6A50 2020
                                   0D0A 870A' (for all JPEG-2000 family
                                   files)
File extension(s):                 jpf is declared at
                                   http://www.nist.gov/nics/. jpx is
                                   also an acceptable file extension,
                                   although it is not recommended for
                                   files on a desktop computer that are
                                   not directly associated with a MIME
                                   media type

Marc

-- 
[Norton SystemWorks 2002] Wipe Info uses hexadecimal values to wipe
files. This provides more security than wiping with decimal values.
                           -- Norton SystemWorks 2002 Manual, p.160
                              (seen on Cryptogram 12/01)
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