Open Issues

Apply the following changes to selected issues:

There are 73 open issues listed in the system.

ID State Title Raised on Product Open Actions
ISSUE-10 (edit)
OPEN Allowing pointers to pre-rendered audio forms of elements 2008-12-03 TTML2 0
ISSUE-21 (edit)
window anchor points
OPEN window anchor points not supported? 2008-12-05 TTML2 0
ISSUE-22 (edit)
window fade in/out
OPEN window fade in/out not supported? 2008-12-05 TTML2 0
ISSUE-24 (edit)
OPEN subscript and superscript support 2008-12-05 TTML2 0
ISSUE-25 (edit)
role parameters
OPEN role parameters support 2008-12-05 TTML2 0
ISSUE-167 (edit)
attribute syntax
OPEN allowing attributes that have no semantics on specific elements 2012-04-13 TTML2 0
ISSUE-179 (edit)
px measure
OPEN Interpreting the pixel measure 2012-08-24 TTML2 0
ISSUE-201 (edit)
OPEN How to specify aspect ratio to understand positioning that may apply for display or video. 2013-02-21 TTML2 0
ISSUE-210 (edit)
rgba() alpha value space
OPEN The values for alpha in rgba() don't correspond to CSS3 Color definitions 2013-05-15 TTML2 0
ISSUE-213 (edit)
text outline
OPEN Advance notice of deprecation for textOutline 2013-05-23 TTML2 0
ISSUE-224 (edit)
3D text placement
OPEN Support text placement in 3D coordinate spaces (not zIndex compositing). 2013-05-30 TTML2 0
ISSUE-225 (edit)
Relative tts:fontSize
OPEN tts:fontSize as percentage of container dimensions 2013-05-30 TTML2 0
ISSUE-228 (edit)
Ruby text
OPEN Ruby text support 2013-05-30 TTML2 0
ISSUE-229 (edit)
Mixed progression
OPEN Mixed vertical-horizontal progression direction 2013-05-30 TTML2 0
ISSUE-230 (edit)
Forced display
OPEN Forced display 2013-05-30 TTML2 0
ISSUE-234 (edit)
Drop Shadow
OPEN Drop Shadow character style 2013-05-30 TTML2 0
ISSUE-235 (edit)
OPEN Feathering of shadow and outline effects 2013-05-30 TTML2 0
ISSUE-236 (edit)
Character spacing
OPEN Character spacing, i.e. letter-spacing 2013-05-30 TTML2 0
ISSUE-237 (edit)
Inline space
OPEN Inline space 2013-05-30 TTML2 0
ISSUE-238 (edit)
OPEN smpte:backgroundImage 2013-05-30 TTML2 0
ISSUE-239 (edit)
OPEN smpte:backgroundImageHorizontal 2013-05-30 TTML2 0
ISSUE-240 (edit)
OPEN smpte:backgroundImageVertical 2013-05-30 TTML2 0
ISSUE-241 (edit)
OPEN smpte:data (inline binary data) 2013-05-30 TTML2 0
ISSUE-242 (edit)
OPEN smpte:image (inline image data) 2013-05-30 TTML2 0
ISSUE-243 (edit)
OPEN smpte:information (source material information) 2013-05-30 TTML2 0
ISSUE-244 (edit)
OPEN m608:channel 2013-05-30 TTML2 0
ISSUE-245 (edit)
OPEN m608:fieldStart 2013-05-30 TTML2 0
ISSUE-246 (edit)
OPEN smpte:information@programName 2013-05-30 TTML2 0
ISSUE-247 (edit)
OPEN smpte:information@programType 2013-05-30 TTML2 0
ISSUE-248 (edit)
OPEN smpte:information@contentAdvisory 2013-05-30 TTML2 0
ISSUE-249 (edit)
OPEN smpte:information@captionService 2013-05-30 TTML2 0
ISSUE-250 (edit)
OPEN smpte:information@copyAndRedistributionControl 2013-05-30 TTML2 0
ISSUE-265 (edit)
Bad tests
OPEN Some bad tests 2013-07-26 TTML 1.0 Test Suite 0
ISSUE-270 (edit)
OPEN Appendix N assumption that root temporal extent corresponds with the beginning of a related media object 2013-08-12 TTML2 0
ISSUE-273 (edit)
OPEN Map fontFamily to external font file resources 2013-08-15 TTML2 0
ISSUE-276 (edit)
OPEN ttp:version vs ttp:profile vs ttp:contentProfile 2013-09-05 TTML2 0
ISSUE-278 (edit)
OPEN Tightening schema support for foreign vocabulary. 2013-09-05 0
ISSUE-283 (edit)
Deterministic Presentation
OPEN Deterministic text wrapping and presentation 2013-10-10 TTML2 0
ISSUE-284 (edit) OPEN value of lineHeight 2013-10-11 TTML2 0
ISSUE-285 (edit)
OPEN Align rendered rows within a region to each other, and the set to the region 2013-10-23 TTML2 0
ISSUE-286 (edit)
OPEN Extend the background area behind rendered text to improve readability 2013-10-23 TTML2 0
ISSUE-287 (edit)
Binary Tunnelling
OPEN Generic ability to tunnel BASE64 encoded binary files for legacy support 2013-10-23 TTML2 0
ISSUE-288 (edit)
Document Segmentation
OPEN Rules for splitting and accumulating documents 2013-10-23 TTML2 0
ISSUE-289 (edit)
OPEN For TTML created for overlay on top of video, signal the aspect ratio of the video the TTML was created for 2013-10-31 TTML2 0
ISSUE-290 (edit)
Active Format Descriptor
OPEN For TTML created for overlaying on video, add ebuttm:documentTargetActiveFormatDescriptor 2013-10-31 TTML2 0
ISSUE-291 (edit)
OPEN Document Intended Target Bar Data 2013-10-31 TTML2 0
ISSUE-292 (edit)
OPEN Specify target formats for which the TTML has been authored for easy conversion 2013-10-31 TTML2 0
ISSUE-293 (edit)
OPEN Specify date as well as hours, minutes and seconds in time expressions 2013-10-31 TTML2 0
ISSUE-294 (edit)
Shrink text to fit on a line
OPEN Style attribute to prevent overflow by shrinking text to fit on a line 2013-11-05 TTML2 0
ISSUE-297 (edit)
OPEN Include Profile Designator in Profile Definition Document 2013-11-11 TTML2 0
ISSUE-300 (edit)
tts:origin correct fallback
OPEN Prior interpretation of the correct fallback for tts:origin 2014-02-26 TTML2 0
ISSUE-301 (edit)
Apply TTML 2 profile to IMSC
OPEN IMSC should reflect revised TTML 2 profile mechanism 2014-02-26 TTML IMSC 2.0 0
ISSUE-302 (edit)
line spacing vs line area height
OPEN Should background of a span be height of text in line or computed lineHeight? 2014-03-20 TTML2 0
ISSUE-303 (edit)
<a> link element
OPEN Permit HTML-style <a> elements to contain href links 2014-03-21 TTML2 0
ISSUE-306 (edit)
Fractional time expressions in N.2 media timeBase
OPEN Appendix N.2 omits fractional time expressions 2014-05-02 TTML 1.0 0
ISSUE-307 (edit)
Profile and conformance terminology
OPEN Conformance language and processor profile rather than content profile. 2014-05-02 TTML IMSC 1.0 0
ISSUE-315 (edit)
Maximum number of regions should be a processor constraint
OPEN Maximum number of regions should be a processor constraint 2014-05-21 TTML IMSC 1.0 0
ISSUE-319 (edit)
HRM should be a processor compliance test
OPEN HRM should be a processor compliance test and allow different levels of complexity for different use cases 2014-05-23 TTML IMSC 1.0 0
ISSUE-322 (edit)
Drop NTSC Formula
OPEN Formula for dropNTSC time expressions is incorrect. 2014-06-19 TTML 1.0 0
ISSUE-324 (edit)
Prefer end to dur on generated out-of-line regions
OPEN Prefer end to dur on generated out-of-line regions 2014-07-09 TTML2 0
ISSUE-325 (edit) OPEN Add 'prohibited' value to @ttp:validation 2014-07-17 TTML2 0
ISSUE-327 (edit)
IMSC should meet W3C QA Framework Spec guidelines
OPEN IMSC should meet W3C QA Framework Spec guidelines 2014-07-21 TTML IMSC 1.0 0
ISSUE-328 (edit)
John Birch
OPEN ittm:altText should be in TT namespace in TTML 2.0 2014-07-23 TTML2 0
ISSUE-329 (edit)
Implement Change Proposal 5
OPEN Implement the mapping information in change proposal 5 2014-07-25 TTML2 0
ISSUE-332 (edit)
#cellResolution support
OPEN #cellResolution support 2014-08-07 TTML IMSC 1.0 0
ISSUE-333 (edit) OPEN use of application default frameRateMultipler, subFrameRate 2014-08-08 TTML 1.0 0
ISSUE-335 (edit)
Negative times for offsets
OPEN In order to handle offsets between start time in TTML docs and start time in video, allow negative times to be used in fragment begin times. 2014-08-14 0
ISSUE-337 (edit)
Update for TTML2
OPEN Update SDP-US for TTML2 2014-08-15 TTML Simple Delivery Profile for Closed Captions (US) 0
ISSUE-338 (edit) OPEN inconsistent implicit duration of singleton span in sequential container 2014-08-26 TTML 1.0 0
ISSUE-339 (edit)
allow #overflow
OPEN Allow the use of #overflow 2014-08-27 TTML IMSC 1.0 0
ISSUE-341 (edit) OPEN ambiguous definition for determination of descendant region identifier 2014-08-27 TTML 1.0 0
ISSUE-342 (edit)
add 2 ebutts elements
OPEN Add ebutts:multiRowAlign and ebutts:linePadding attributes to the IMSC Text Profile 2014-09-03 TTML IMSC 1.0 0
ISSUE-344 (edit)
Note for unqualified attributes
OPEN Add a clarification note expressing intent behind unqualified attribute names 2014-09-09 TTML2 0

Raise an issue .

David Singer <>, Nigel Megitt <>, Chairs, Thierry Michel <>, Philippe Le Hégaret <>, Staff Contacts
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <>.
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