is a port of Ruby on Rails migrations feature to CL. It provides a simple way to version-control your database changes. As a web project grows, it's database will go through numerous structural changes, but if things go wrong with a new version, there should be a proper way to disable new changes to database and bring it back to a previously known good position. Rails has a very simple and neat way of doing this, so I have ported the feature to CL.
Author: Vamsee Kanakala