Quick question and I apologize if this has already been answered.

Example - DDT has been used to create a new SQL database. Now I've made changes in the DDT and I apply those changes to my SQL database.

Question - How does the DDT keep track of updates, revisions, etc? More important, How can I check that outside the DDT in my Strataframe/VB.net app?

I'm working on a merge application that will take a database and import it's data into another database and I want to be able to check that the databases are a matching schema and then store that schema version number into a config database.

Thanks
Matt

Have a look at the SF source code and check the DatabaseMigrator class. If you go through it you will see how the DDT package is used for deployment.