2 Information Levels and Frameworks
Abstract
This chapter discusses four information levels (conceptual, logical, physical, external), four aspects of the conceptual level (asserted fact types, constraints, derivation rules, transactions), gives a database design example, and then discusses development frameworks.
Keywords
Information level; Conceptual level; Logical level; Physical level; External level; Information framework; Database design; Development framework
2.1 Four Information Levels
Some advanced information systems are described as “intelligent”. What intelligence is and whether machines will ever ...
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