I have think on that too (perhaps on top of sqlite). You can see some cool ideas at http://www.try-alf.org/blog/2013-10-21-relations-as-first-class-citizen http

I have think on that too (perhaps on top of sqlite). You can see some cool ideas at http://www.try-alf.org/blog/2013-10-21-relations-as-first-class-citizen http://www.try-alf.org/blog/2013-10-21-relations-as-first-cl...