Question: 1. What do you understand by the term "semantic modeling"?
2. Identify the four broad steps involved in defining an "extended" model such as the FAR model.
3. Toby J. Teorey, Dongqing Yang, and James P. Fry. "A Logical Design Methodology for Relational Databases Using the Extended Entity-Relationship Model." ACM Comp. Sum 18, No. 2 (June 1986). The "extended E/R model" adds support for generalization and subset hierarchies (two variants on type hierarchies), nulls, and relationships involving more than two participants.