[MPEG-OTSPEC] Fwd: AHG Zoom meeting

[Vladimir Levantovsky]

Forwarding the AHG meeting summary (previously sent to all
meeting participants) to the public AHG list, with participants' emails and
Zoom link information redacted.

---------- Forwarded message ---------
From: Vladimir Levantovsky <vladimir.levantovsky at gmail.com>
Date: Wed, Sep 27, 2023 at 12:55 PM
Subject: AHG Zoom meeting


AHG Zoom meeting

Dear all,

Thank you all for your active participation at today's meeting. This email
is just a brief recap of the AHG discussions, and the decisions we made
today:
1. On "Beyond 64K glyphs" proposal: accepted in principle with minor
changes and typo fixes. The finalized submission will use capitalized table
tags for all new tables, with each table description getting it's own
subclause to preserve the overall structure of the OFF standard. Changes
and extensions in the existing tables will be clearly defined as amended
content.
2. On "Representative Instance" proposal: accepted in principle with minor
clarifications. The finalized submission will be prepared against the
existing text of the current Working Draft (rev.7) - Skef and I will work
together to prepare the input contribution.
3. On "Condition value" proposal: accepted as proposed, with additional
editorial changes to be made regarding the positioning of explanatory /
normative spec content. The finalized submission will be prepared against
the existing text of the current Working Draft (rev.7) - Skef and I will
work together to prepare the input contribution.
4. On "Feature variations: New Substitution mechanism" proposal: deferred
for further discussions after the October SC29/WG3 meeting.

Thanks again,
Vladimir

AHG Zoom meeting
Wednesday Sep 27, 2023 ⋅ 10am – 12pm (Eastern Time - New York)
Dear all,

Following up on previous AHG hybrid meeting, please see below the new Zoom
meeting info and agenda. Please review the documents ahead of time to make
the use of AHG meeting time most efficient and productive.

The AHG meeting will be held under the following ISO rules and polices:
- Declaration for participants in ISO activities
<https://www.google.com/url?q=https%3A%2F%2Fwww.iso.org%2Fdeclaration-for-participants-in-iso-activities.html&sa=D&source=calendar&usd=2&usg=AOvVaw1K1ZhTSGdEYabyb3FrA6_c>
- ISO Code of Ethics and Conduct
<https://www.google.com/url?q=https%3A%2F%2Fwww.iso.org%2Ffiles%2Flive%2Fsites%2Fisoorg%2Ffiles%2Fstore%2Fen%2FPUB100011.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw0f9aSO--n-tWAzqM4Jj6Ay>
- Guideline for Implementation of the Common Patent Policy for
ITU‑T/ITU‑R/ISO/IEC
<https://www.google.com/url?q=https%3A%2F%2Fwww.iso.org%2Ffiles%2Flive%2Fsites%2Fisoorg%2Ffiles%2Fdeveloping_standards%2Fresources%2Fdocs%2F20221216_Guidelines_for_Implementation_of_the_Common_Patent_Policy.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw0wZCA85yFR9rexXNnxQ4Eh>

Agenda
1. Overcoming 64K glyph limit and other updates - see proposed changes: h
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fliamquin%2Fboring-expansion-spec%2Fblob%2Fmain%2Fiso_docs%2FWG03-beyond-64k-glyphs-proposal.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw2XoLkc2XF4B_OSFStZcaD8>
https://github.com/harfbuzz/boring-expansion-spec/blob/main/iso_docs/WG03-beyond-64k-glyphs-proposal.pdf
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fharfbuzz%2Fboring-expansion-spec%2Fblob%2Fmain%2Fiso_docs%2FWG03-beyond-64k-glyphs-proposal.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw1K2jyLxE0m7viM7a6vSvj7>

- Review and discuss proposed table changes and inter-dependencies;
- backward compatibility concerns?
- implementation (deployment) challenges for various platforms?

2. Variable substitutions / interface default settings:
- Representative instance proposal (
https://github.com/adobe-type-tools/opentype-spec-drafts/blob/main/repinstance_spec.pdf
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fadobe-type-tools%2Fopentype-spec-drafts%2Fblob%2Fmain%2Frepinstance_spec.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw2eKP26ZViyeGRIz92s1FuB>
)
- Variation conditions: condition value (
https://github.com/adobe-type-tools/opentype-spec-drafts/blob/main/condvalue_spec.pdf
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fadobe-type-tools%2Fopentype-spec-drafts%2Fblob%2Fmain%2Fcondvalue_spec.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw3JNH_Tz3mG-H96iYNVlHEi>
)
- Feature variations: new substitution mechanism (
https://github.com/adobe-type-tools/opentype-spec-drafts/blob/main/newfeatvar.pdf
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fadobe-type-tools%2Fopentype-spec-drafts%2Fblob%2Fmain%2Fnewfeatvar.pdf&sa=D&source=calendar&usd=2&usg=AOvVaw13LVIKcjnzj9yKopK1J_0f>
)

Zoom meeting info:
(REDACTED)
Guests
(REDACTED)
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