Data Models

• A collection of representations for describing:

  • data, data relationships, data semantics, data constraints

• Object-based logical models

  • Entity-Relationship (ER) model
  • Object-oriented model
  • Semantic model
  • Functional model

• Record-based logical models

  • Relational model (e.g. SQL/DS, DB2)
  • Network model
  • Hierarchical Model

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