Re: [PNG] Meeting minutes - Sep 15th, 2025

Just to add to Leo’s comments about ISO docs...

The JPEG committee has been trying to “free” their specs for quite a while now - and as you can see, not having any luck.  As Leo notes, turning a pre-existing standard into a Publicly Available Specification (PAS) is pretty much unheard of.  You need to do it at the time you create the standard itself, and if you choose to do that, you have to go down a different path than regular IS (International Standards).

(Comments about C2PA/Content Credentials in a separate thread)

Leonard

From: Leo Barnes <barnes.leo@gmail.com>
Date: Monday, September 15, 2025 at 7:11 PM
To: Chris Blume (ProgramMax) <programmax@gmail.com>
Cc: Portable Network Graphics (PNG) Working Group <public-png@w3.org>
Subject: Re: [PNG] Meeting minutes - Sep 15th, 2025


EXTERNAL: Use caution when clicking on links or opening attachments.


Regarding making ISO specs public/free, this is something we have investigated a bit in the past. Generally it is not possible unless the spec is also published publicly elsewhere (typically if it's a joint project between multiple SDOs).
The fact that an open/public spec wants to reference it is generally not considered a valid reason for requesting ISO to make a spec public unfortunately.

Cheers,
//Leo

On Mon, 15 Sept 2025 at 18:17, Chris Blume (ProgramMax) <programmax@gmail.com<mailto:programmax@gmail.com>> wrote:
Attached is a PDF of the meeting minutes from Sep 15th, 2025.

Executive summary:

  *   iDOT will be added to the extensions, since it is so widely used
  *   not adding support for mismatched ICC profiles (IE RGB on grayscale data)
  *   C2PA seems useful, we need more info
  *   We will continue to wait for other specs. Some are expected soon. We will request certain spec be made freely available to the public so we can reference them.

Our next meeting is Sep 29th, 2025.
See you then!