title: How best can I extract a logical model from a physical DB model
body: <p>We have made substantial changes to our physical DB, now as it is the end of the project I would like to abstract a logical model from this, to allow me to generate schemas for both Oracle and SQL Server. </p>
  
  <p>Can anyone guide me as to the best way to achieve this. I was hoping TOAD data modeller would help but I can't seem to see any options to do what I require? </p>