Documentation about Trix's format?

Is there documentation somewhere for _how_ Trix formats text, i.e. which HTML tags it uses?

There are plenty of GitHub issues that make it clear that it doesn't use `

` for paragraphs, and as frustrating as that may be, converting markup for use with Trix would be trivial if there was a comprehensive list of tags it actually does support.

I've done some searching on GitHub and Google and not found such a document, though. Have I missed it?

No file or test is named in the issue. Start by locating where Trix defines or emits its supported HTML formatting, then document the comprehensive list of tags and paragraph representation; done means the documentation is easy to find and sufficient for converting markup to Trix.

Written by the indexing model from the issue text.