I have a list definition which is not using content types, but instead by default has a title field. Besides this I've created one other field directly in the list definition. 

I generated the list definition using visual studio. There is no mention of the title field in the xml schema under fields. 

How would I go about ensuring that the title field should contain unique values in this list?

EDIT, I can do this using the GUI. So how can I generate / view the schema of a list in Sharepoint 2010. Then I would be able to see the list definition. Would be extremely useful info.