This is personal study note Copyright and original reference are from: https://www.youtube.com/watch?v=WIckks0nJbQ&list=PLuHgQVnccGMDF6rHsY9qMuJMd295Yk4sa ================================================================================ Mapping rule logical_data_model=convert(source=ER_diagram,rule=mapping_rule) ================================================================================ mapping_rule