Fwd: UAX#50 conformance: Is it possible to update existing fonts without causing damage to existing non-CSS applications?

---------- Forwarded message ---------
From: fantasai <fantasai@inkedblade.net>
Date: 2019年12月11日(水) 8:51
Subject: Re: UAX#50 conformance: Is it possible to update existing fonts
without causing damage to existing non-CSS applications?
To: MURATA Makoto <eb2m-mrt@asahi-net.or.jp>
Cc: Taro Yamamoto <tyamamot@adobe.com>, Florian Rivoal <florian@rivoal.net>,
Nat McCully <nmccully@adobe.com>


On 12/10/19 6:41 PM, MURATA Makoto wrote:
> Folks,
>
> Here is my plan.
>
>   * In an APL seminar (January) for publishers, I will point out this
issue.
>     This is to make publishers aware of this issue.
>   * In another seminar (Februrary) of Japanese Character Information
>     Technology Promotion Council (CITPC), I will repeat the same talk but
put
>     more emphasis on technical issues.  This is to tell font vendors that
>     publishers care.
>   * A subcommittee of CITPC, which is chaired by me, investigates ALL
>     characters in JIS X 0213 carefully.
>   * In the JWG, we will discuss possible solutions.  I expect that  some
>     enhancement to OpenType is needed.  This will take at least a year.
>     Probably, two years.
>   * Of course, I will keep in touch with Taiwanese.  Should somebody from
>     HongKong be involved?
>   * Some errata to Writing Modes or even the 2nd edition can hopefully be
>     published by W3C.

I think the changes that are necessary are primarily to OpenType and UAX50,
actually. If some new feature is added that Writing Modes needs to invoke,
we
can note that in the spec, but the dependencies on specific OpenType
features
in Writing Modes are informative, not normative anyway.

~fantasai



-- 
Regards,
Makoto