The idea was to have something to refer dialect authors to when e.g. writing a new document store dialect and wondering in which way certain constructs should be mapped. Of course they can look at the existing dialects of the same category to get inspiration, but it'd be nice and easier to consume to have more authoritative mapping guide.

Not sure how it would look like exactly, for doc stores it e.g. probably be a condensed description of the strategies used for MongoDB.