"WebVTT file using only nested cues"

"A WebVTT file whose cues all have an end time offset x greater than or  
equal to the end time offsets of all the cues whose start time offsets are  
less than x is said to be a WebVTT file using only nested cues."
http://dev.w3.org/html5/webvtt/#webvtt-file-using-only-nested-cues

I have two problems with this definition. First, it takes considerable  
mental focus to understand what it means (at least for me). It would be  
nice if it could be explained more clearly, and/or give examples that  
match the definition and examples that don't.

Secondly, the name implies that all cues must be nested, since the file is  
said to be using "only" nested cues, but this is not the case, so maybe  
the definition should have a more accurate name. I was considering "WebVTT  
file with no overlapping cues", but that's not accurate either if nested  
cues are also overlapping.

-- 
Simon Pieters
Opera Software

Received on Friday, 27 January 2012 11:56:54 UTC