I am in the process of writing an OTP-ish dialect of Erlang that compiles to Javascript and has its own runtime environment (http://luvv.ie/mission.html http://

I am in the process of writing an OTP-ish dialect of Erlang that compiles to Javascript and has its own runtime environment (http://luvv.ie/mission.html http://luvv.ie/mission.html) so maps is a more work for me, so I am a bit yay!/sigh!... The thing that I am less clear about with maps is their relationship with Mnesia tables going forward. Mnesia tables take their schema from records. I suspect we will go down the route of having records that contain 'privileged' fields (effectively ones you can have indexes on) and field that contain maps which allow to 'extend' the schema without performing difficult state transforms. It will certainly help when you need to add a field to a record and thread that change through a running system without stopping it.