Topic on Talk:Multi-Content Revisions/Database Schema

content_format can sensibly be derived from the model, or detected from the data. We don't need to track it.

We can only omit this if we do a more global change to require that all content handlers supporting multiple formats auto-detect the format instead of having it be passed in. For all existing code that I'm aware of this seems certainly doable.

Since most handlers only support a single format in the first place, this should be trivial. And it would save us quite a bit of work, and it would reduce the complexity of the schema somewhat.