David, thanks for the reply, my question basically surrounds how one would approach the identification and classification of data structures within an enterprises databases given little to no forward information surrounding the systems or applications which actually use those particular databases. Aside from really looking inside each database, table, field, etc. I was just curious if there were any methods with which others have approached this daunting task that proved useful. In either case it doesn't sound like something easily answered but I was curious in either case.