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RE: [css3-writing-modes] Summary of Tr in UTR#50 and 'text-orientation' discussions

From: Koji Ishii <kojiishi@gluesoft.co.jp>
Date: Sun, 6 Oct 2013 01:30:58 -0400
To: John Daggett <jdaggett@mozilla.com>, Rossen Atanassov <Rossen.Atanassov@microsoft.com>
CC: "www-style@w3.org" <www-style@w3.org>, "CJK discussion (public-i18n-cjk@w3.org)" <public-i18n-cjk@w3.org>
Message-ID: <A592E245B36A8949BDB0A302B375FB4E7CC8BAEA9C@MAILR001.mail.lan>
> From: John Daggett [mailto:jdaggett@mozilla.com]
> Rossen Atanassov wrote:
> >> James Clark said, for the same reason as John's #3 and Sylvain, CSS
> >> should only allow UTR#50-compliant impl and disallow tailoring.
> >>
> >> My preference is to allow both UTR#50 and the tailoring in John's #2.
> >> CSS already allows a lot of tailoring, such as Turkish uppercasing or
> >> UAX#14 grapheme cluster. As a secondary preference, if tailoring is
> >> really bad and that subtle consistency is critical, I'd agree with
> >> James.
> >
> > How about take it out of CSS all together? Unicode already defines it
> > all so why can't we leave it at that and remove these properties from CSS?
> By this you mean omit 'text-orientation' altogether?

+1 to Rossen. I think by "take it out" he meant to take out section 5.1.1 Mixed Vertical Orientations, which defines the values of the Unicode Vertical_Orientation property.

The original text was there before UTR#50 was born and was necessary at that point. We modified the text to follow changes in UTR#50, but had never tried to remove it. At this point where UTR#50 was finally published, we don't have to re-define what the values of a Unicode property means in a CSS spec.

I'm still ok to say "in the event of difficulties to implement, the UA may interpret Tr as Tu," which is John and Nat's proposal over a year ago.

Note that I failed to talk with i18n last week since I wasn't aware of the summer time change. I'll do that next week, and John proposed us two to talk next week. Hope we have better mutual understanding after that.


Received on Sunday, 6 October 2013 05:31:29 UTC

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