Process classes implements lower-level business abstractions - Objects Design

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• Nirja Shah   -Posted on 16 Oct 15
  - The types of design classes are:
  
  User interface classes
  – It defines all abstractions necessary for human-computer interaction (usually via metaphors of real-world objects)
  
  Business domain classes
  – It is refined from analysis classes; identify attributes and services (methods) that are required to implement some element of the business domain
  
  Process classes
  – It implements business abstractions required to fully manage the business domain classes
  
  Persistent classes
  – It represent data stores (e.g., a database) that will persist beyond the execution of the software
  
  System classes
  – It implement software management and control functions that enable the system to operate and communicate within its computing environment and the outside world

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