I was looking through various searches on google and other forums and had no luck so I figured I would ask here even though it has nothing to do with Database Administration but it is the right audience.

What are the different levels of Oracle Database Adminsitration regarding title and salary? I see Database Adminsitrator 1-4 (are there more?) and Jr., Mid., Sr., Lead, Principal. Has anyone found a nice reference chart as to how these are mapped out with education, experience, skill level, etc?

Thanks!