Official specification of the AOM group for the carriage of ID3 Timed Metadata in the Common Media Application Format (CMAF).
The specification is written in a special syntax (a mixture of markup and markdown) that enables the creation of cross-references, syntax highlighting, etc. The file that uses this syntax is called index.bs.
The index.bs file is processed to produce an HTML version index.html by a tool called Bikeshed, which is run when content is pushed onto the main branch or when Pull Requests are made.