Start Level 1 Node: Technical IntegrationTechnical IntegrationEnd Level 1 Node: Technical Integration
   Start Level 2 Node: SAP R/3 Plug-InSAP R/3 Plug-InEnd Level 2 Node: SAP R/3 Plug-In
   Start Level 2 Node: Core Interface (CIF)Core Interface (CIF)End Level 2 Node: Core Interface (CIF)