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Re: [TTML2] tts:{width,height} rename

From: David Singer <singer@apple.com>
Date: Tue, 27 Jan 2015 16:36:10 +0100
Cc: John Birch <John.Birch@screensystems.tv>, TTWG <public-tt@w3.org>
Message-id: <A5E04B3A-4482-4AD6-A015-F96DF61D7684@apple.com>
To: Nigel Megitt <nigel.megitt@bbc.co.uk>

> On Jan 27, 2015, at 16:30 , Nigel Megitt <nigel.megitt@bbc.co.uk> wrote:
> 
> Maybe inlineLength and blockLength to avoid the width/height confusion?

I was about to suggest inlineLength and stackingLength, like you to avoid terms like ‘height’…

> 
> Nigel
> 
> 
> On 27/01/2015 15:27, "John Birch" <John.Birch@screensystems.tv> wrote:
> 
>> +1 on the yikes.... !
>> 
>> I understand the intent to reduce confusion, but like David I'm not
>> convinced this helps...
>> ( **If** I was to make a proposal it would be more along the lines of
>> inlineWidth and blockHeight ).
>> 
>> Best,
>> John
>> 
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>> P Before printing, think about the environment-----Original Message-----
>> From: David Singer [mailto:singer@apple.com]
>> Sent: 27 January 2015 14:37
>> To: TTWG
>> Subject: Re: [TTML2] tts:{width,height} rename
>> 
>> yikes
>> 
>> it’s nice if the terms are readable.  Linewidth and Lineheight have some
>> … recognition, albeit mostly in writing systems that use horizontal lines
>> assembled into vertical blocks.
>> 
>> ipd and bpd are directions, not measurements, aren’t they? and they don’t
>> exactly roll off the tongue or leap to mind in terms of recognizability
>> 
>>> On Jan 26, 2015, at 1:01 , Glenn Adams <glenn@skynav.com> wrote:
>>> 
>>> The use of width and height as writing mode relative properties is
>>> confusing. Change their names to ipd and bpd, abbreviations for inline
>>> progression dimension and block progression dimension, respectively, and
>>> document convention that width and height (as well as horizontal and
>>> vertical) are always absolute and not writing mode relative. The only
>>> exception being that 'height' in lineHeight remains writing mode
>>> relative, i.e., specifies the nominal bpd of a line area.
>>> 
>>> Change image to use tts:extent instead of the former tts:{width,height}
>>> in order to use absolute axes in expressing explicit image dimensions.
>>> 
>>> Addressed above comments in [1].
>>> 
>>> [1] https://dvcs.w3.org/hg/ttml/rev/69877acd9380
>> 
>> David Singer
>> Manager, Software Standards, Apple Inc.
>> 
>> 
>> 
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> 

David Singer
Manager, Software Standards, Apple Inc.
Received on Tuesday, 27 January 2015 15:36:48 UTC

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