kimgio: One library for 2 file types

Michael Ritzert kde at
Wed Dec 25 19:13:24 GMT 2002

Hi Marc,

Am Freitag, 20. Dezember 2002 16:41 schrieb Marc Mutz:
> On Friday 20 December 2002 16:04, kde at wrote:
> <snip>
> > Do you have more recent verification for that? While I'm inclined to
> > believe you, I have seen image/j2k "in the wild". See for example
> >
> <snip>
> None of them is registered with IANA, although they all use the IETF
> branch. The draft is clear that image/jp2 is the mime type to use for
> all currently defined JPEG2000 still image modes, while reserving i/jpx
> for further extensions that warrant a new mime type. Plus some movie
> modes. I don't know why such an easy thing as a mime type registration
> hasn't been pursued to the end, but I asked on ietf-types at
> about them (answer pending). contains the mail apparently sent to 
IANA by the JPEG registering image/jp2.
Problem is: That document seems outdated, too. The 12byte signature given in 
section 4 does not match any of the JPEG2000 files I have found (it's always 
2020 instead of 1a1a - some kind of versioning?)...

So unless your request to IANA yields a proof for the official existence of 
the image/j2k type, I will remove the support for this type from KDE CVS at 
the end of the week.


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