Re: [media-types] Request feedback for proposed media-type registration

[Mark Callow <[e-mail]>]

As requested, please advise on the following. Sending again in case it was not forwarded to the list.

Regards

    -Mark

> On Mar 23, 2020, at 16:56, Mark Callow <[e-mail]> wrote:
> 
> Greetings Media-Type Experts
> 
> I write to you as the point of contact for an existing media type in the standards tree, image/ktx which is promulgated by the Khronos Group.
> 
> Khronos has almost completed a new version of the specification known formally as The KTX File Format Version 2 <http://github.khronos.org/KTX-Specification/> and wishes to ensure this can be used within the Media-Type framework. Version 2 is significantly different from the existing version to the point where software that knows only about Version 1 will not be able to do anything useful with a Version 2 file. The purpose of both formats is the same, to be a container for texture data for 3D APIs. We expect Version 2 to have significant uptake due to its powerful features, including jpeg-levels of compression for transmitting texture data with transcoding to GPU block-compressed formats for use after receipt. It is likely to supplant version 1.
> 
> I should point out that both versions differs from a traditional image file in that the payload can consist of multiple possibly disparate images for cases such as mipmaps, array textures, cube maps or 3d textures.
> 
> The most likely course seems to be to register a new Media-Type image/ktx2. A putative registration application is attached. However I want to consult the experts here as to whether there are any alternative approaches that would be better such as using the tree or facets. For example creating a new tree image/texture/{ktx1,ktx2} or, using facets instead, image/texture.{ktx1,ktx2} or something else entirely. Maybe even just adding a new magic number to the existing registration.
> 
> Please advise. If a new Media-Type is the right way to go, then please review the attached draft registration.
> 
> Regards
> 
>     -Mark
> 
> <ktx-media-registration.txt>
> 
>