ACTION-164: Investigate interop issues using CSS familyName constructs

Investigate interop issues using CSS familyName constructs

State:
closed
Person:
Jerry Smith
Due on:
December 5, 2013
Created on:
May 30, 2013
Related emails:
  1. {minutes} TTWG Meeting 30/01/2014 (from nigel.megitt@bbc.co.uk on 2014-01-30)
  2. {agenda} TTWG Meeting 30/01/2014 (from nigel.megitt@bbc.co.uk on 2014-01-30)
  3. {minutes} 16/1/14 TTWG meeting (from nigel.megitt@bbc.co.uk on 2014-01-16)
  4. {agenda} 16/1/14 TTWG meeting (from nigel.megitt@bbc.co.uk on 2014-01-16)
  5. TTWG Agenda for 9/1/14 (from nigel.megitt@bbc.co.uk on 2014-01-08)
  6. Minutes for 12/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-12)
  7. TTWG Agenda for 12/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-11)
  8. Re: TTWG Agenda for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-11)
  9. Re: TTWG Agenda for 5/12/13 (from glenn@skynav.com on 2013-12-11)
  10. RE: TTWG Agenda for 5/12/13 (from mdolan@newtbt.com on 2013-12-10)
  11. TTWG Minutes for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-05)
  12. TTWG Agenda for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-04)
  13. {minutes} 21/11/13 TTWG Meeting (from nigel.megitt@bbc.co.uk on 2013-11-21)
  14. Re: TTML Agenda for 21/11/13 (from cyril.concolato@telecom-paristech.fr on 2013-11-21)
  15. Re: TTML Agenda for 21/11/13 (from glenn@skynav.com on 2013-11-21)
  16. Re: TTML Agenda for 21/11/13 (from tmichel@w3.org on 2013-11-21)
  17. TTML Agenda for 21/11/13 (from nigel.megitt@bbc.co.uk on 2013-11-20)
  18. {minutes} Halloween TTML Meeting and Thank You Sean (from plh@w3.org on 2013-10-31)
  19. RE: TTML Agenda for 31/10/13 (from Sean.Hayes@microsoft.com on 2013-10-31)
  20. TTML Agenda for 31/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-30)
  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. TTML Agenda for 15/08/13 (from Sean.Hayes@microsoft.com on 2013-08-15)
  25. Re: TML Agenda for 06/08/13 (from glenn@skynav.com on 2013-08-08)
  26. Re: TML Agenda for 06/08/13 (from pal@palemieux.com on 2013-08-08)
  27. TML Agenda for 06/08/13 (from Sean.Hayes@microsoft.com on 2013-08-08)
  28. [minutes] Timed Text 20130725 (from plh@w3.org on 2013-07-25)
  29. TTML Agenda for 25/07/13 (from Sean.Hayes@microsoft.com on 2013-07-25)

Related notes:

[plh]: this is about the embedded unicode mapping

25 Jul 2013, 15:08:24

This is related to our not using the CSS {unicode} escape mechanism in familyName syntax.

Glenn Adams, 25 Jul 2013, 15:08:59

The concern here is to make sure that font <familyName> expressions are easy to apply in CSS. The current specification does not support the CSS2 defined escape, and so requires expressions be converted for use in CSS.

The current approach simplifies authoring by consistently using XML escapes.

Jerry Smith, 12 Dec 2013, 16:16:09

I have reviewed this with IE CSS contacts and got fairly strong pushback on aligning with CSS. That gives the highest chance of high fidelity rendering, and is philosophically cleaner than setting the spec based on currently available tools.

It is, however, possible for UAs to pre-parse the TT content and modify Unicode escapes. We don't believe it is the correct trade-off in this case though.

Jerry Smith, 16 Jan 2014, 15:30:09

Display change log.

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
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