SDP-US Editorial (A.3) - Issue 188 - Add future need regarding drawing performance
authorGlenn Adams <glenn@skynav.com>
Wed, 28 Nov 2012 23:59:09 -0700
changeset 3215c9941317402
parent 320 62295c03d3c6
child 322 e97977dfca4f
SDP-US Editorial (A.3) - Issue 188 - Add future need regarding drawing performance
ttml10-sdp-us/Overview.html
ttml10-sdp-us/Overview.src.html
     1.1 --- a/ttml10-sdp-us/Overview.html	Wed Nov 28 23:49:46 2012 -0700
     1.2 +++ b/ttml10-sdp-us/Overview.html	Wed Nov 28 23:59:09 2012 -0700
     1.3 @@ -503,7 +503,7 @@
     1.4        
     1.5      
     1.6    
     1.7 -</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a></li><li class="tocline"><a href="#conformance" class="tocxref"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a href="#terms" class="tocxref"><span class="secno">3. </span>Terms, Definitions, and Conventions</a></li><li class="tocline"><a href="#SimpleProfile" class="tocxref"><span class="secno">4. </span>Simple Delivery Profile for Closed Captions</a><ul class="toc"><li class="tocline"><a href="#Use_of_TTML_Constrained_Feature_Template" class="tocxref"><span class="secno">4.1 </span>Use of TTML Constrained Feature Template</a><ul class="toc"></ul></li></ul></li><li class="tocline"><a href="#structural-constraints" class="tocxref"><span class="secno">5. </span>Structural Constraints</a></li><li class="tocline"><a href="#Constrained_Features" class="tocxref"><span class="secno">6. </span>Constrained Features</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_core" class="tocxref"><span class="secno">6.1 </span>Use of Constrained TTML Feature <span>core</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario" class="tocxref"><span class="secno">6.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints" class="tocxref"><span class="secno">6.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content" class="tocxref"><span class="secno">6.2 </span>Use of Constrained TTML Feature <span>content</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-1" class="tocxref"><span class="secno">6.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-1" class="tocxref"><span class="secno">6.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_presentation" class="tocxref"><span class="secno">6.3 </span>Use of Constrained TTML Feature <span>presentation</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-2" class="tocxref"><span class="secno">6.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-2" class="tocxref"><span class="secno">6.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_profile" class="tocxref"><span class="secno">6.4 </span>Use of Constrained TTML Feature <span>profile</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-3" class="tocxref"><span class="secno">6.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-3" class="tocxref"><span class="secno">6.4.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_structure" class="tocxref"><span class="secno">6.5 </span>Use of Constrained TTML Feature <span>structure</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-4" class="tocxref"><span class="secno">6.5.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-4" class="tocxref"><span class="secno">6.5.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#Style_Constraints" class="tocxref"><span class="secno">7. </span>Style Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_backgroundColor" class="tocxref"><span class="secno">7.1 </span>Use of Constrained TTML Feature <span>backgroundColor-*</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-5" class="tocxref"><span class="secno">7.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-5" class="tocxref"><span class="secno">7.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_color" class="tocxref"><span class="secno">7.2 </span>Use of Constrained TTML Feature <span>color</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-6" class="tocxref"><span class="secno">7.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-6" class="tocxref"><span class="secno">7.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_region" class="tocxref"><span class="secno">7.3 </span>Use of Constrained TTML Feature <span>display-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-7" class="tocxref"><span class="secno">7.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-7" class="tocxref"><span class="secno">7.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_extent_region" class="tocxref"><span class="secno">7.4 </span>Use of Constrained TTML Feature <span>extent-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-8" class="tocxref"><span class="secno">7.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-8" class="tocxref"><span class="secno">7.4.2 </span>Constraints</a></li><li class="tocline"><a href="#examples" class="tocxref"><span class="secno">7.4.3 </span>Examples</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontFamily_generic" class="tocxref"><span class="secno">7.5 </span>Use of Constrained TTML Feature <span>fontFamily-generic</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-9" class="tocxref"><span class="secno">7.5.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-9" class="tocxref"><span class="secno">7.5.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontSize" class="tocxref"><span class="secno">7.6 </span>Use of Constrained TTML Feature <span>fontSize</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-10" class="tocxref"><span class="secno">7.6.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-10" class="tocxref"><span class="secno">7.6.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontStyle_italic" class="tocxref"><span class="secno">7.7 </span>Use of Constrained TTML Feature <span>fontStyle-italic</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-11" class="tocxref"><span class="secno">7.7.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-11" class="tocxref"><span class="secno">7.7.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_length_percentage" class="tocxref"><span class="secno">7.8 </span>Use of Constrained TTML Feature <span>length-percentage</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-12" class="tocxref"><span class="secno">7.8.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-12" class="tocxref"><span class="secno">7.8.2 </span>Constraints</a><ul class="toc"></ul></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_length_positive" class="tocxref"><span class="secno">7.9 </span>Use of Constrained TTML Feature <span>length-positive</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-13" class="tocxref"><span class="secno">7.9.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-13" class="tocxref"><span class="secno">7.9.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling" class="tocxref"><span class="secno">7.10 </span>Use of Constrained TTML Feature <span>styling-*</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-14" class="tocxref"><span class="secno">7.10.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-14" class="tocxref"><span class="secno">7.10.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling_inheritance_content" class="tocxref"><span class="secno">7.11 </span>Use of Constrained TTML Feature <span>styling-inheritance-content</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-15" class="tocxref"><span class="secno">7.11.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-15" class="tocxref"><span class="secno">7.11.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling_inheritance_region" class="tocxref"><span class="secno">7.12 </span>Use of Constrained TTML Feature <span>styling-inheritance-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-16" class="tocxref"><span class="secno">7.12.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-16" class="tocxref"><span class="secno">7.12.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textAlign_absolute" class="tocxref"><span class="secno">7.13 </span>Use of Constrained TTML Feature <span>textAlign-absolute</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-17" class="tocxref"><span class="secno">7.13.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-17" class="tocxref"><span class="secno">7.13.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textDecoration_under" class="tocxref"><span class="secno">7.14 </span>Use of Constrained TTML Feature <span>textDecoration-under</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-18" class="tocxref"><span class="secno">7.14.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-18" class="tocxref"><span class="secno">7.14.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textOutline_unblurred" class="tocxref"><span class="secno">7.15 </span>Use of Constrained TTML Feature <span>textOutline-unblurred</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-19" class="tocxref"><span class="secno">7.15.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-19" class="tocxref"><span class="secno">7.15.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_writingMode_horizontal_lr" class="tocxref"><span class="secno">7.16 </span>Use of Constrained TTML Feature <span>writingMode-horizontal-lr</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-20" class="tocxref"><span class="secno">7.16.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-20" class="tocxref"><span class="secno">7.16.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#layout_constraints" class="tocxref"><span class="secno">8. </span>Layout Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_layout" class="tocxref"><span class="secno">8.1 </span>Use of Constrained TTML Feature <span>layout</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-21" class="tocxref"><span class="secno">8.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-21" class="tocxref"><span class="secno">8.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_lineBreak-uax14" class="tocxref"><span class="secno">8.2 </span>Use of Constrained TTML Feature <span>lineBreak-uax14</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-22" class="tocxref"><span class="secno">8.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-22" class="tocxref"><span class="secno">8.2.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#timing_constraints" class="tocxref"><span class="secno">9. </span>Timing Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_timing" class="tocxref"><span class="secno">9.1 </span>Use of Constrained TTML Feature <span>timing</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-23" class="tocxref"><span class="secno">9.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-23" class="tocxref"><span class="secno">9.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_time_offset" class="tocxref"><span class="secno">9.2 </span>Use of Constrained TTML Feature <span>time-offset</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-24" class="tocxref"><span class="secno">9.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-24" class="tocxref"><span class="secno">9.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#frameRate" class="tocxref"><span class="secno">9.3 </span>Use of Constrained TTML Feature <span>frameRate and frameRateMultiplier</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-25" class="tocxref"><span class="secno">9.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-25" class="tocxref"><span class="secno">9.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#animation" class="tocxref"><span class="secno">9.4 </span>Use of Constrained TTML Feature <span>animation</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-26" class="tocxref"><span class="secno">9.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-26" class="tocxref"><span class="secno">9.4.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#other_constraints" class="tocxref"><span class="secno">10. </span>Other Constraints</a><ul class="toc"><li class="tocline"><a href="#Section1" class="tocxref"><span class="secno">10.1 </span>User Ease of Use Constraints</a></li></ul></li><li class="tocline"><a href="#Features_in_TTML_1.0_Used" class="tocxref"><span class="secno">11. </span>Features in TTML 1.0 Used in This Profile</a></li><li class="tocline"><a href="#error_handling" class="tocxref"><span class="secno">12. </span>Error handling</a></li><li class="tocline"><a href="#future_needs" class="tocxref"><span class="secno">A. </span>Future Needs for TTML next for Simple Delivery</a><ul class="toc"><li class="tocline"><a href="#Section2" class="tocxref"><span class="secno">A.1 </span>Values for fontFamily support</a></li><li class="tocline"><a href="#Section3" class="tocxref"><span class="secno">A.2 </span>Support for character edge features</a></li></ul></li><li class="tocline"><a href="#mapping-of-us-government-requirements-to-constrained-profile-features" class="tocxref"><span class="secno">B. </span>Mapping of US Government Requirements to Constrained Profile Features</a></li><li class="tocline"><a href="#code-points" class="tocxref"><span class="secno">C. </span>Code points</a><ul class="toc"><li class="tocline"><a href="#color-values" class="tocxref"><span class="secno">C.1 </span>Color values</a></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">C.2 </span>Acknowledgements</a></li></ul></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">D. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">D.1 </span>Normative references</a></li><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">D.2 </span>Informative references</a></li></ul></li></ul></section>
     1.8 +</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a></li><li class="tocline"><a href="#conformance" class="tocxref"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a href="#terms" class="tocxref"><span class="secno">3. </span>Terms, Definitions, and Conventions</a></li><li class="tocline"><a href="#SimpleProfile" class="tocxref"><span class="secno">4. </span>Simple Delivery Profile for Closed Captions</a><ul class="toc"><li class="tocline"><a href="#Use_of_TTML_Constrained_Feature_Template" class="tocxref"><span class="secno">4.1 </span>Use of TTML Constrained Feature Template</a><ul class="toc"></ul></li></ul></li><li class="tocline"><a href="#structural-constraints" class="tocxref"><span class="secno">5. </span>Structural Constraints</a></li><li class="tocline"><a href="#Constrained_Features" class="tocxref"><span class="secno">6. </span>Constrained Features</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_core" class="tocxref"><span class="secno">6.1 </span>Use of Constrained TTML Feature <span>core</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario" class="tocxref"><span class="secno">6.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints" class="tocxref"><span class="secno">6.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content" class="tocxref"><span class="secno">6.2 </span>Use of Constrained TTML Feature <span>content</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-1" class="tocxref"><span class="secno">6.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-1" class="tocxref"><span class="secno">6.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_presentation" class="tocxref"><span class="secno">6.3 </span>Use of Constrained TTML Feature <span>presentation</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-2" class="tocxref"><span class="secno">6.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-2" class="tocxref"><span class="secno">6.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_profile" class="tocxref"><span class="secno">6.4 </span>Use of Constrained TTML Feature <span>profile</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-3" class="tocxref"><span class="secno">6.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-3" class="tocxref"><span class="secno">6.4.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Use_of_Constrained_TTML_Feature_content_structure" class="tocxref"><span class="secno">6.5 </span>Use of Constrained TTML Feature <span>structure</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-4" class="tocxref"><span class="secno">6.5.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-4" class="tocxref"><span class="secno">6.5.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#Style_Constraints" class="tocxref"><span class="secno">7. </span>Style Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_backgroundColor" class="tocxref"><span class="secno">7.1 </span>Use of Constrained TTML Feature <span>backgroundColor-*</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-5" class="tocxref"><span class="secno">7.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-5" class="tocxref"><span class="secno">7.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_color" class="tocxref"><span class="secno">7.2 </span>Use of Constrained TTML Feature <span>color</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-6" class="tocxref"><span class="secno">7.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-6" class="tocxref"><span class="secno">7.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_region" class="tocxref"><span class="secno">7.3 </span>Use of Constrained TTML Feature <span>display-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-7" class="tocxref"><span class="secno">7.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-7" class="tocxref"><span class="secno">7.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_extent_region" class="tocxref"><span class="secno">7.4 </span>Use of Constrained TTML Feature <span>extent-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-8" class="tocxref"><span class="secno">7.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-8" class="tocxref"><span class="secno">7.4.2 </span>Constraints</a></li><li class="tocline"><a href="#examples" class="tocxref"><span class="secno">7.4.3 </span>Examples</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontFamily_generic" class="tocxref"><span class="secno">7.5 </span>Use of Constrained TTML Feature <span>fontFamily-generic</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-9" class="tocxref"><span class="secno">7.5.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-9" class="tocxref"><span class="secno">7.5.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontSize" class="tocxref"><span class="secno">7.6 </span>Use of Constrained TTML Feature <span>fontSize</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-10" class="tocxref"><span class="secno">7.6.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-10" class="tocxref"><span class="secno">7.6.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_display_display_fontStyle_italic" class="tocxref"><span class="secno">7.7 </span>Use of Constrained TTML Feature <span>fontStyle-italic</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-11" class="tocxref"><span class="secno">7.7.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-11" class="tocxref"><span class="secno">7.7.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_length_percentage" class="tocxref"><span class="secno">7.8 </span>Use of Constrained TTML Feature <span>length-percentage</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-12" class="tocxref"><span class="secno">7.8.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-12" class="tocxref"><span class="secno">7.8.2 </span>Constraints</a><ul class="toc"></ul></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_length_positive" class="tocxref"><span class="secno">7.9 </span>Use of Constrained TTML Feature <span>length-positive</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-13" class="tocxref"><span class="secno">7.9.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-13" class="tocxref"><span class="secno">7.9.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling" class="tocxref"><span class="secno">7.10 </span>Use of Constrained TTML Feature <span>styling-*</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-14" class="tocxref"><span class="secno">7.10.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-14" class="tocxref"><span class="secno">7.10.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling_inheritance_content" class="tocxref"><span class="secno">7.11 </span>Use of Constrained TTML Feature <span>styling-inheritance-content</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-15" class="tocxref"><span class="secno">7.11.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-15" class="tocxref"><span class="secno">7.11.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_styling_inheritance_region" class="tocxref"><span class="secno">7.12 </span>Use of Constrained TTML Feature <span>styling-inheritance-region</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-16" class="tocxref"><span class="secno">7.12.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-16" class="tocxref"><span class="secno">7.12.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textAlign_absolute" class="tocxref"><span class="secno">7.13 </span>Use of Constrained TTML Feature <span>textAlign-absolute</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-17" class="tocxref"><span class="secno">7.13.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-17" class="tocxref"><span class="secno">7.13.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textDecoration_under" class="tocxref"><span class="secno">7.14 </span>Use of Constrained TTML Feature <span>textDecoration-under</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-18" class="tocxref"><span class="secno">7.14.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-18" class="tocxref"><span class="secno">7.14.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_textOutline_unblurred" class="tocxref"><span class="secno">7.15 </span>Use of Constrained TTML Feature <span>textOutline-unblurred</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-19" class="tocxref"><span class="secno">7.15.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-19" class="tocxref"><span class="secno">7.15.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_writingMode_horizontal_lr" class="tocxref"><span class="secno">7.16 </span>Use of Constrained TTML Feature <span>writingMode-horizontal-lr</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-20" class="tocxref"><span class="secno">7.16.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-20" class="tocxref"><span class="secno">7.16.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#layout_constraints" class="tocxref"><span class="secno">8. </span>Layout Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_layout" class="tocxref"><span class="secno">8.1 </span>Use of Constrained TTML Feature <span>layout</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-21" class="tocxref"><span class="secno">8.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-21" class="tocxref"><span class="secno">8.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_lineBreak-uax14" class="tocxref"><span class="secno">8.2 </span>Use of Constrained TTML Feature <span>lineBreak-uax14</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-22" class="tocxref"><span class="secno">8.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-22" class="tocxref"><span class="secno">8.2.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#timing_constraints" class="tocxref"><span class="secno">9. </span>Timing Constraints</a><ul class="toc"><li class="tocline"><a href="#Constrained_TTML_Feature_timing" class="tocxref"><span class="secno">9.1 </span>Use of Constrained TTML Feature <span>timing</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-23" class="tocxref"><span class="secno">9.1.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-23" class="tocxref"><span class="secno">9.1.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#Constrained_TTML_Feature_time_offset" class="tocxref"><span class="secno">9.2 </span>Use of Constrained TTML Feature <span>time-offset</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-24" class="tocxref"><span class="secno">9.2.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-24" class="tocxref"><span class="secno">9.2.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#frameRate" class="tocxref"><span class="secno">9.3 </span>Use of Constrained TTML Feature <span>frameRate and frameRateMultiplier</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-25" class="tocxref"><span class="secno">9.3.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-25" class="tocxref"><span class="secno">9.3.2 </span>Constraints</a></li></ul></li><li class="tocline"><a href="#animation" class="tocxref"><span class="secno">9.4 </span>Use of Constrained TTML Feature <span>animation</span></a><ul class="toc"><li class="tocline"><a href="#usage-scenario-26" class="tocxref"><span class="secno">9.4.1 </span>Usage Scenario</a></li><li class="tocline"><a href="#constraints-26" class="tocxref"><span class="secno">9.4.2 </span>Constraints</a></li></ul></li></ul></li><li class="tocline"><a href="#other_constraints" class="tocxref"><span class="secno">10. </span>Other Constraints</a><ul class="toc"><li class="tocline"><a href="#Section1" class="tocxref"><span class="secno">10.1 </span>User Ease of Use Constraints</a></li></ul></li><li class="tocline"><a href="#Features_in_TTML_1.0_Used" class="tocxref"><span class="secno">11. </span>Features in TTML 1.0 Used in This Profile</a></li><li class="tocline"><a href="#error_handling" class="tocxref"><span class="secno">12. </span>Error handling</a></li><li class="tocline"><a href="#future_needs" class="tocxref"><span class="secno">A. </span>Future Needs for TTML next for Simple Delivery</a><ul class="toc"><li class="tocline"><a href="#Section2" class="tocxref"><span class="secno">A.1 </span>Values for fontFamily support</a></li><li class="tocline"><a href="#Section3" class="tocxref"><span class="secno">A.2 </span>Support for character edge features</a></li><li class="tocline"><a href="#Section4" class="tocxref"><span class="secno">A.3 </span>Specify rendering model that accounts for drawing performance</a></li></ul></li><li class="tocline"><a href="#mapping-of-us-government-requirements-to-constrained-profile-features" class="tocxref"><span class="secno">B. </span>Mapping of US Government Requirements to Constrained Profile Features</a></li><li class="tocline"><a href="#code-points" class="tocxref"><span class="secno">C. </span>Code points</a><ul class="toc"><li class="tocline"><a href="#color-values" class="tocxref"><span class="secno">C.1 </span>Color values</a></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">C.2 </span>Acknowledgements</a></li></ul></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">D. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">D.1 </span>Normative references</a></li><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">D.2 </span>Informative references</a></li></ul></li></ul></section>
     1.9  
    1.10  <section id="introduction">
    1.11  <!--OddPage--><h2><span class="secno">1. </span>Introduction</h2>
    1.12 @@ -1739,6 +1739,10 @@
    1.13  <h3><span class="secno">A.2 </span>Support for character edge features</h3>
    1.14  <p>Additional character edge features for raised, depressed, and drop shadowed edges are suggested for consideration in a future version of TTML.</p>
    1.15  </section>
    1.16 +<section class="appendix" id="Section4">
    1.17 +<h3><span class="secno">A.3 </span>Specify rendering model that accounts for drawing performance</h3>
    1.18 +<p>Consideration may be given to defining a rendering model that accounts for drawing performance.</p>
    1.19 +</section>
    1.20  </section>
    1.21  <section class="appendix" id="mapping-of-us-government-requirements-to-constrained-profile-features">
    1.22  <!--OddPage--><h2><span class="secno">B. </span>Mapping of US Government Requirements to Constrained Profile Features</h2>
     2.1 --- a/ttml10-sdp-us/Overview.src.html	Wed Nov 28 23:49:46 2012 -0700
     2.2 +++ b/ttml10-sdp-us/Overview.src.html	Wed Nov 28 23:59:09 2012 -0700
     2.3 @@ -1563,6 +1563,10 @@
     2.4  <h3>Support for character edge features</h3>
     2.5  <p>Additional character edge features for raised, depressed, and drop shadowed edges are suggested for consideration in a future version of TTML.</p>
     2.6  </section>
     2.7 +<section class='appendix' id='Section4'>
     2.8 +<h3>Specify rendering model that accounts for drawing performance</h3>
     2.9 +<p>Consideration may be given to defining a rendering model that accounts for drawing performance.</p>
    2.10 +</section>
    2.11  </section>
    2.12  <section class='appendix'>
    2.13  <h2>Mapping of US Government Requirements to Constrained Profile Features</h2>