CLASS & TYPE

• CLASSES REPRESENT THE IMPLEMENTATION OF TYPES - THEY SUPPLY:
  
  
  • IMPLEMENTATION: METHODS & ATTRIBUTES
  • MANAGEMENT OF CLASS EXTENT
  
  
• TYPE SUPPLIES THE INTERFACE

• SPECIFIC SYSTEMS DIVIDE THESE THREE AREAS IN DIFFERENT WAYS:
  
  
  1. CLASS INCLUDES BOTH INTERFACE & IMPLEMENTATION - EXTENT MANAGED SEPARATELY (BAGS, SETS)
  2. CLASS INCLUDES INTERFACE, IMPLEMENTATION & EXTENT MANAGEMENT
  3. TYPE INCLUDES INTERFACE & IMPLEMENTATION - CLASS IS UNDERSTOOD AS EXTENT OF A TYPE

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Ugo O. Gagliardi
GSD-6306 Spring 2003-2004