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

From: John Birch <John.Birch@screensystems.tv>
Date: Tue, 27 Jan 2015 15:27:19 +0000
To: David Singer <singer@apple.com>, TTWG <public-tt@w3.org>
Message-ID: <0981DC6F684DE44FBE8E2602C456E8AB016C152DF2@SS-IP-EXMB-01.screensystems.tv>
+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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Received on Tuesday, 27 January 2015 15:27:50 UTC

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