Subsetting HTML

[hober]

The explainer currently allows only a subset of HTML elements to be used in cue fragments. Is this a good idea? In general, I'm pretty skeptical of features which subset other parts of the platform.

[marcoscaceres]

IIRC, the subset is defined by WebVTT... @eric-carlson can confirm.

[eric-carlson]

VTT defines a subset, this allows more than WebVTT. I thought a "generic" cue API would likely need a bigger subset, so I chose the list of nodes required by imsc.js. We talked about modifying it, e.g. dropping , and proposing whatever we end with as the WebVTT subset.