The Rel Forum

Thank you very much! Now I understand what the <INIT> statement do. Code that you posted works.

Hello. I don't understand how I can create a new type in Rel with multiple possreps. Here is a code example from Date's "Introduction to DB Systems" that I tried to execute in Rel: TYPE Point POSSREP Cartesian { x RATIONAL, y RATIONAL } POSSREP Polar { r RATIONAL, o RATIONAL }; The error i...