Call for Participation: Portable Network Graphics (PNG) Working Group Charter approved; Join the PNG WG

Dear Members of the PNG Working Group,

I'm relaying the following announcement that was sent to W3C Advisory 
Committee Representative earlier today, to notify the group of the new 
charter approval and call for participation.

With kind regards,
Xueyuan Jia, Manager, Member Communications

-------- Forwarded Message --------
Subject:  Call for Participation: Portable Network Graphics (PNG) 
Working Group Charter approved; Join the PNG WG
Date:  Fri, 21 Nov 2025 14:57:04 +0800
From:  Xueyuan Jia <xueyuan@w3.org>
To:  w3c-ac-members@w3.org


Dear Advisory Committee Representative,
[This announcement will be forwarded to W3C group chairs]

W3C is pleased to announce the recharter of the Portable Network 
Graphics (PNG) Working Group.
https://www.w3.org/Graphics/PNG/png-2025.html

The group is chartered through 2027-11-21.

The mission of the PNG Working Group is to maintain and develop the 
Portable Network Graphics (PNG) specification.

Please use the following form to have your organization join the group. 
The form will also instruct you how to nominate participants:
https://www.w3.org/groups/wg/png/join

Please consider diversity when proposing people to participate in W3C 
groups. Representation from a wider group of people, especially people 
from under-represented groups, is vital for creating web standards that 
meet the needs of the wider web community.

If your organization is currently in the group, please note that you 
will need to have it re-join the group as the new charter adds a new 
deliverable with licensing obligations under the W3C Patent Policy. This 
Call for Participation triggers the start of the 45 days grace period. See:
https://www.w3.org/2020/09/15-pp-faq.html#recharter

The group chair remains Chris Blume (W3C Invited Expert). The Staff 
Contact remains Chris Lilley <chris@w3.org> for a total of 0.1 FTE.

More information about the group can be found on the group home page:
https://www.w3.org/groups/wg/png/

[...]
To see all changes relative to the proposed charter, follow this link:
https://services.w3.org/htmldiff?doc1=https%3A%2F%2Fwww.w3.org%2FGraphics%2FPNG%2Fpng-2025-ac.html&doc2=https%3A%2F%2Fwww.w3.org%2FGraphics%2FPNG%2Fpng-2025.html

To see all changes relative to the previous charter, follow this link:
https://services.w3.org/htmldiff?doc1=https%3A%2F%2Fwww.w3.org%2FGraphics%2FPNG%2Fpng-2023.html&doc2=https%3A%2F%2Fwww.w3.org%2FGraphics%2FPNG%2Fpng-2025.html

This announcement follows section 5.7.2 of the W3C Process Document:
https://www.w3.org/policies/process/20250818/#ACReviewAfter

and the Call for Participation follows section 4.5 of the W3C Process 
Document:
https://www.w3.org/policies/process/20250818/#cfp

Thank you,

For Philippe le Hégaret, VP, Technical Strategy,
Chris Lilley, PNG Working Group Staff Contact;
Xueyuan Jia, Manager, Member Communications