This is the source of the WebVTT specification.
Contributions can be made via the W3C Text Tracks Community Group.
Generating the spec
This spec is generated using bikeshed.
To generate a CG draft, run:
$ bikeshed spec
To generate a WD snapshot, run e.g.:
$ ./snapshot.sh WD 2016-01-01 2015-12-08
Also see https://github.com/w3c/webvtt/commit/754f13e3cf03d6036c3e4628c6920d17b412f778 for manual fixup of the generated output.