Database Schema Changes over Different Versions

[CoffeeAddict]

I'm porting my subtext blog v2.1.0.5 and want to know if the schema had changed much up to the last build.  I'm wanting to create a helper tool that will run independently of running the Subtext forum that would:

1) Run the Blog ML code that's in Subtext

2) Formats/preps things properly and Imports it into FunnelWeb HQ database instance

But I am wondering if the schema has changed much, if not then I will have less to consider when writing this tool that others could take and use if they wanted to port over to FunnelWeb.

Please advise on the schema history.