ISSUE-64: tts:dynamicFlow - need to clarify what timeline is used by flow timers in B.5

tts:dynamicFlow - need to clarify what timeline is used by flow timers in B.5

State:
CLOSED
Product:
TTML 1.0
Raised by:
Glenn Adams
Opened on:
2009-04-23
Description:
I see that the current spec does not indicate what timeline to use for
the purpose of interpreting time expressions in <flowIntervalFunction>,
namely, a <duration> argument to intra() or inter() flow interval functions;
it would seem appropriate that this should be defined to be the same
timeline as used for DFXP content, namely, as determined by ttp:timeBase; in
the case of SMPTE discontinuous (marker) mode, it probably should be real
time, since duration is not well defined on the discontinuous SMPTE
timeline; i will add normative text that calls out these timeline semantics;
Related Actions Items:
No related actions
Related emails:
  1. ISSUE-64: tts:dynamicFlow - need to clarify what timeline is used by flow timers in B.5 [DFXP 1.0] (from sysbot+tracker@w3.org on 2009-04-23)

Related notes:

resolved in TTAF1-DFXP WD Editor's Copy Update - 20090427

Glenn Adams, 27 Apr 2009, 04:03:24

Changelog:

Created issue 'tts:dynamicFlow - need to clarify what timeline is used by flow timers in B.5' nickname owned by Glenn Adams on product DFXP 1.0, description 'I see that the current spec does not indicate what timeline to use for
the purpose of interpreting time expressions in <flowIntervalFunction>,
namely, a <duration> argument to intra() or inter() flow interval functions;
it would seem appropriate that this should be defined to be the same
timeline as used for DFXP content, namely, as determined by ttp:timeBase; in
the case of SMPTE discontinuous (marker) mode, it probably should be real
time, since duration is not well defined on the discontinuous SMPTE
timeline; i will add normative text that calls out these timeline semantics;' non-public

Glenn Adams, 23 Apr 2009, 05:10:49

Status changed to 'closed'

Glenn Adams, 27 Apr 2009, 04:03:24


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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