Identity

• Data organization using objects which are:
  • Discrete, distinguishable entities
  • Concepts, abstractions with well defined boundaries
  • Represent real-world knowledge
  • Examples of Objects
    • Paragraph or Image in a document
    • Person working in a Factory
    • A Scheduling Policy

  
  

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  Attributes, Operations, And Methods

  • Objects have Attributes, e.g.,
    • An Attribute of a Paragraph Object is the Paragraph Length
    • An Attribute of a Factory Worker Object is the Skill Level
    • An Attribute of a Company Policy Object is the Implementation Date
  • These Attributes have Values
    • 57 characters (Paragraph Length)
    • Novice (Skill Level)
    • 1997 (Implementation Date)
  • These Objects Also have Operations (Behaviors):
    • displayThisParagraph
    • weld Part
    • implementPolicy
  • A Specific Implementation of an Operation is Called a Method.

  
  

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