Database and Expert System Technology - Information Systems Reengineering, Integration and Normalization - page 79

Questions
Question 2.1
What is data modeling? What are the relationships between conceptual schema,
logical schema, and internal (physical file) schema in the Anxi-X3 architecture of
data modeling?
Question 2.2
a. How can one show the process of reengineering in terms of the processes of
forward engineering and reverse engineering?
b. What is an ER model and what are its components?
c. What is the relationship between DTD and Data Type Definition graph? Describe
the application of Data Type Definition graph?
Question 2.3
Can multiple Relational Schemas be integrated into one Relational Schema? Give
the rational of your answer. How can the integration of Relational Schemas be com-
pared with the integration of extended ER models with respect to meeting users'
requirements?
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