1. Michael Stonebraker and Joseph Hellerstein. What Goes Around Comes Around. In “Readings in Database Systems” (aka the Red Book). 4th ed.
While reading this paper, try to focus on the following questions:
What is physical and logical data independence?
Briefly discuss physical and logical data independence in IMS, Codasyl, and the relational model.
Briefly discuss the different data models that followed the relational model. What was the goal of each model? Did it succeed or not? What are some reasons for this?
2. Alon Halevy: Query answering using views: a survey. Only Sections 1, 2, and 3 are mandatory. The remaining are optional. Main idea: all data models can be traslated to relational, and can be recovered by using views.