ISSUE-417: #writingMode constraint inconsistent in image profile

#writingMode constraint inconsistent in image profile

Raised by:
Pierre-Anthony Lemieux
Opened on:
TTML1 states

"""[...] supports the #writingMode feature if it recognizes and is capable of transforming all defined values of the tts:writingMode attribute."""

IMSC1 common provisions state that "#writingMode MAY be used", but the image profile state that "#writingMode-vertical SHALL not be used."

So #writingMode should be removed from common provisions and moved to individual profile provisions.
Related Actions Items:
No related actions
Related emails:
  1. {minutes} TTWG Meeting 2015-10-15 (from on 2015-10-15)
  2. {agenda} TTWG Meeting 2015-10-15 (from on 2015-10-14)
  3. {minutes} TTWG Meeting 2015-09-24 (from on 2015-09-24)
  4. {agenda} TTWG Meeting 2015-09-24 (from on 2015-09-23)
  5. ISSUE-417: #writingMode constraint inconsistent in image profile [TTML IMSC 1.0] (from on 2015-09-21)

Related notes:

Addressed at

#writingMode is now described as "Not applicable since some, but not all, implied features are permitted" in the image profile and as "May be used" in the text profile.

Pierre-Anthony Lemieux, 8 Oct 2015, 01:47:07

See also

Pierre-Anthony Lemieux, 15 Oct 2015, 15:28:02

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David Singer <>, Nigel Megitt <>, Chairs, Thierry Michel <>, Philippe Le Hégaret <>, Atsushi Shimono <>, Staff Contacts
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