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1.3.03. Miniworld approximation

  • Universe of Discourse, or Miniworld
  • Miniworld is an incomplete model of the real world
  • The relational data model as a model for the miniworld
  • Approximation
    • Separate and distinct entities
    • Single complex entities
    • Separate related entities
    • Cardinality of relationships
  • Each relation made up of attributes
  • Values can be used as references
‹ 1.3.02. Access across relationsup1.3.04. Pointing mechanism ›
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