Problem:
Question 1: What does it mean to say that the conceptual schema is the "common denominator" of multiple user views and internal stored representations?
Question 2: Does an operating system (DOS, Unix, NT) have a "data dictionary"? If so, can a user access it? How?
Question 3: Why are the interfaces in the ANSI/SPARC model numbered 34 through 38 important?
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