Are there any perl-based database migration systems similar to what is built into rails?

From what I understand, rails keeps a schema version number in a table in the database, then has a migration script which will determine which upgrade/downgrade scripts need to be run to bring the database from its current state to the desired state. The upgrade/downgrade scripts can be managed under revision control, thus providing a way to revision control the structure of the database.

I found the following CPAN modules: DBIx::Migration and DBIx::Migration::Directories, and old discussion OT: Ways of managing changes to a database's structure during a project., and some inquiries ActiveRecord migrations-type implementation in perl? and Interface suggestions. Is anyone else doing any active work in this area?