is#distributed_software_system
  supertype:  system  a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going"
  tool of:  distributed_system_management_task
  subtype:  distributed_IR_system
     subtype:  distributed_hypertext_IR_system__distributedhypertextirsystem  e.g. the WWW
        subtype:  WWW
     subtype:  Semantic_Web

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