Comment events

A very useful feature of Sub Station Alpha subtitle format was the 
possibility to declare a certain subtitle as comment.
In this way the subtitle is not visualized during playback but is 
editable exactly as a dialogue subtitle.

This kind of subtitle events comes very useful for storing 
translator/typesetter comments to the other people who'll work on the 
script; They are also useful for making a local backup copy of the 
subtitle when you test new feature for that subtitle and you probably 
want to come back to the original for or leave the original form in the 
script for a latter analisys/documentaion.

Proposal:

Insert a new element type among the <subtitle> section's valid subnodes, 
named <comment> that has exactly the same characteristics of the <text> 
element except that it will not be visualized during script playback.

Visualizing the whole thing, the new structure becomes like this (taken 
from Toff's visual representation):

  <subtitle                                        +-subtitle    (1..N)
    start="hh:mm:ss.mmm"                    @-start     (1)
    stop="hh:mm:ss.mmm"                    @-stop      (0..1)
    duration="hh:mm:ss.mmm">            @-duration  (0..1)
    <text></text>                                 +-text      (0..N)
    <comment></comment>                +-comment   (0..N)
    <image></image>                          +-image     (0..N)
    <karaoke></karaoke>                  +-karaoke   (0..N)
    <shape/>                                       +-shape     (0..N)
    ...
  </subtitle>

Any comment/suggestion is welcome.
No replies means "go on" (unmei?).

Regards.   Kaiousama

http://usf.corecodec.org