ISSUE-374: Generalize tts:fontVariantPosition

Generalize tts:fontVariantPosition

State:
OPEN
Product:
TTML2
Raised by:
Glenn Adams
Opened on:
2015-02-23
Description:
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.
Related Actions Items:
No related actions
Related emails:
  1. {minutes} TTWG Meeting 2015-02-26 (from nigel.megitt@bbc.co.uk on 2015-02-26)
  2. {agenda} TTWG Meeting 2015-02-26 (from nigel.megitt@bbc.co.uk on 2015-02-25)
  3. Re: ISSUE-374: Generalize tts:fontVariantPosition [TTML2] (from glenn@skynav.com on 2015-02-23)
  4. Re: ISSUE-374: Generalize tts:fontVariantPosition [TTML2] (from nigel.megitt@bbc.co.uk on 2015-02-23)
  5. ISSUE-374: Generalize tts:fontVariantPosition [TTML2] (from sysbot+tracker@w3.org on 2015-02-23)

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David Singer <singer@apple.com>, Nigel Megitt <nigel.megitt@bbc.co.uk>, Chairs, Thierry Michel <tmichel@w3.org>, Philippe Le H├ęgaret <plh@w3.org>, Staff Contacts
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <w3t-sys@w3.org>.
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