[codr7]

Didn't know that about PostgreSQL, thanks.

I'm aiming to be as ACID as makes sense for a project this scale, it's slowly getting there.

The disk format is straight Lisp, I want it human readable and easy to process. Versioning is a consequence of the log format and tracking the different versions in memory.

By relational I mean based on tables, or relations; take away SQL and it's more or less the same thing.

No query languages planned, I strongly prefer an API to a query language for interfacing with the database.