ISSUE-236: Character spacing, i.e. letter-spacing

Character spacing

Character spacing, i.e. letter-spacing

State:
CLOSED
Product:
TTML2
Raised by:
Pierre-Anthony Lemieux
Opened on:
2013-05-30
Description:
[The following is extracted from the liaison received from SMPTE at https://lists.w3.org/Archives/Member/w3c-archive/2012Sep/0214.html]

See Section 6.4.11 at ST 428-7.

It shall be possible to introduce a constant amount of additional spacing between characters within a <span> element. The spacing shall be expressed as a decimal number in units of em and shall be no less than -1 em.

Note: this can be used to lengthen or shorten the extent of the <span> element slightly.
Related Actions Items:
No related actions
Related emails:
  1. Re: [ttml2] Action-369 Action-382 - draft dispositions flattened thread incorporating changes (from nigel.megitt@bbc.co.uk on 2015-03-19)
  2. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-18)
  3. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from glenn@skynav.com on 2015-03-05)
  4. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-05)
  5. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from glenn@skynav.com on 2015-03-04)
  6. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-03-04)
  7. Re: [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-02-25)
  8. [ttml2] Action-369 - collate smpte issues and draft dispositions (from nigel.megitt@bbc.co.uk on 2015-02-06)
  9. {agenda} TTWG Meeting 2015-01-29 (from nigel.megitt@bbc.co.uk on 2015-01-28)
  10. Re: [TTML2] tts:{width,height} rename (from glenn@skynav.com on 2015-01-27)
  11. Re: [TTML2] tts:{width,height} rename (from glenn@skynav.com on 2015-01-27)
  12. {minutes} TTWG Meeting 2014-12-18 (from nigel.megitt@bbc.co.uk on 2014-12-18)
  13. {agenda} TTWG Meeting 2014-12-18 (from nigel.megitt@bbc.co.uk on 2014-12-17)
  14. RE: {minutes} TTWG Meeting 2014-12-04 (from John.Birch@screensystems.tv on 2014-12-04)
  15. Re: {minutes} TTWG Meeting 2014-12-04 (from glenn@skynav.com on 2014-12-04)
  16. {minutes} TTWG Meeting 2014-12-04 (from nigel.megitt@bbc.co.uk on 2014-12-04)
  17. {agenda} TTWG Meeting 2014-12-04 (from nigel.megitt@bbc.co.uk on 2014-12-03)
  18. {minutes} TTWG Meeting 27/11/2014 (from nigel.megitt@bbc.co.uk on 2014-11-27)
  19. Re: {minutes} TTWG Meeting 20/11/2014 (from nigel.megitt@bbc.co.uk on 2014-11-21)
  20. {minutes} TTWG Meeting 20/11/2014 (from nigel.megitt@bbc.co.uk on 2014-11-20)
  21. {minutes} TTML Meeting of 24/10/13 (from glenn@skynav.com on 2013-10-24)
  22. RE: TTML Agenda for 24/10/13 (from mdolan@newtbt.com on 2013-10-23)
  23. TTML Agenda for 24/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-23)
  24. ISSUE-236 (Character spacing): Character spacing, i.e. letter-spacing [TTML.next] (from sysbot+tracker@w3.org on 2013-05-30)

Related notes:

This appears to be a request to support the CSS2.1 letter-spacing property [1], or its more recent rendition in CSS3 Text Module [2].

This also begs the question of whether support should be added for the word-spacing property [3][4].

[1] http://www.w3.org/TR/CSS2/text.html#propdef-letter-spacing
[2] http://www.w3.org/TR/css3-text/#letter-spacing
[3] http://www.w3.org/TR/CSS2/text.html#propdef-word-spacing
[4] http://www.w3.org/TR/css3-text/#word-spacing

Glenn Adams, 30 May 2013, 20:52:23

> This appears to be a request to support the CSS2.1 letter-spacing property [1]

Yes.

Pierre-Anthony Lemieux, 21 Oct 2013, 20:43:43

PAL: P2

Philippe Le Hégaret, 24 Oct 2013, 15:47:51

Add tts:letterSpacing [1].

[1] https://dvcs.w3.org/hg/ttml/rev/35ac76f0108f

Glenn Adams, 1 Dec 2014, 03:14:08

Changelog:

Created issue 'Character spacing, i.e. letter-spacing' nickname Character spacing owned by Pierre-Anthony Lemieux on product TTML.next, description '[The following is extracted from the liaison received from SMPTE at https://lists.w3.org/Archives/Member/w3c-archive/2012Sep/0214.html]

See Section 6.4.11 at ST 428-7.

It shall be possible to introduce a constant amount of additional spacing between characters within a <span> element. The spacing shall be expressed as a decimal number in units of em and shall be no less than -1 em.

Note: this can be used to lengthen or shorten the extent of the <span> element slightly.
' non-public

Pierre-Anthony Lemieux, 30 May 2013, 14:27:12

Status changed to 'open'

Glenn Adams, 4 Jun 2013, 08:49:27

Status changed to 'pending review'

Glenn Adams, 1 Dec 2014, 03:14:08

Status changed to 'closed'

18 Dec 2014, 15:20:25


David Singer <singer@apple.com>, Nigel Megitt <nigel.megitt@bbc.co.uk>, Chairs, Thierry Michel <tmichel@w3.org>, Philippe Le Hégaret <plh@w3.org>, Atsushi Shimono <atsushi@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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