Start Level 1 Node: Enabling Application-to-Application ProcessesEnabling Application-to-Application ProcessesEnd Level 1 Node: Enabling Application-to-Application Processes
   Start Level 2 Node: Application-to-Application IntegrationApplication-to-Application IntegrationEnd Level 2 Node: Application-to-Application Integration
      Start Level 3 Node: Configuration of Usage Type Process Integration (PI)Configuration of Usage Type Process Integration (PI)End Level 3 Node: Configuration of Usage Type Process Integration (PI)
      Start Level 3 Node: Variant-Specific ConfigurationVariant-Specific ConfigurationEnd Level 3 Node: Variant-Specific Configuration
         Start Level 4 Node: Integration Using the Plain J2SE Adapter EngineIntegration Using the Plain J2SE Adapter EngineEnd Level 4 Node: Integration Using the Plain J2SE Adapter Engine