Hi all ! I need help in theory of Databases. I need to details about Data Dictionary. My Questions are about Data Dictionary: 1. Role and Importance of Data Dictionary in DBMS structure ? 2. What are the various types contents available in the data dictionary? My Second topic is Internet and Databases. my Question is: 1.Role of databases in Internet 2.What are various tools available for managing databases in internet Hoping for some Good answers and with tutorials. Thanks.