Conceptual modeling has long been recognized as the primary means to enable so- ware development in information systems and data engineering. Nowadays, conc- tual modeling has become fundamental to any domain in which organizations have to cope with complex, real-world systems. Conceptual modeling fosters communi- tion between information systems developers and end-users, and it has become a key mechanism for understanding and representing computing systems and environments of all kinds, including the new e-applications and the information systems that support them. The International...