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Re: ISSUE-374: Generalize tts:fontVariantPosition [TTML2]

From: Glenn Adams <glenn@skynav.com>
Date: Mon, 23 Feb 2015 07:39:55 -0700
Message-ID: <CACQ=j+cjHWOz5wNS6qzm6N3bqCQg7Mck-T7NZG-UtuMwh56E+g@mail.gmail.com>
To: Nigel Megitt <nigel.megitt@bbc.co.uk>
Cc: Timed Text Working Group <public-tt@w3.org>
The syntax '||' means combination is permitted. So yes, they can combine.
On the other hand, if value is normal, then other tokens cannot appear.

On Mon, Feb 23, 2015 at 3:02 AM, Nigel Megitt <nigel.megitt@bbc.co.uk>
wrote:

> Are the super/sub and full/half variants non-combinable, or is it
> permitted to have "super half" for example?
>
>
> On 23/02/2015 06:55, "Timed Text Working Group Issue Tracker"
> <sysbot+tracker@w3.org> wrote:
>
> >ISSUE-374: Generalize tts:fontVariantPosition [TTML2]
> >
> >http://www.w3.org/AudioVideo/TT/tracker/issues/374
> >
> >Raised by: Glenn Adams
> >On product: TTML2
> >
> >In order to support Japanese (and other CJK) usage, it is useful to
> >support selection of other axes of glyph variation besides position
> >(super/sub). In particular, selection of full width and half width
> >variants, as supported by the OpenType 'fwid' and 'hwid' features, as
> >well as ruby variants, is useful. To this end, the
> >tts:fontVariantPosition property should be renamed to tts:fontVariant,
> >and its values enhanced to specify, at a minimum:
> >
> >* super vs sub (script) forms
> >* full vs half width forms
> >* ruby forms
> >
> >Specifically, propose the value of the generalized property to adhere to
> >the following:
> >
> >tts:fontVariant
> >  : normal
> >  | [ super | sub ] || [ full | half ] || ruby
> >
> >When super or sub is specified, then the 'sups' or 'subs' OpenType
> >feature is enabled. When full or half is specified, then the 'fwid' or
> >'hwid' OpenType feature is enabled. When ruby is specified, then the
> >'ruby' OpenType feature is enabled.
> >
> >
> >
> >
>
>
Received on Monday, 23 February 2015 14:40:42 UTC

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