Enterprise service-oriented architecture integrating Oracle middleware stack with Mauritian government services. Oracle SOA Suite orchestrates data flows from 14 external agencies including Civil Status Division, Passport Office, Revenue Authority, and ministries through a centralized ESB. WebLogic, Siebel CRM, Apex frontend, and Analytics Server sit behind a load balancer in the application tier, connecting to three Oracle Database 26ai clusters for CRM, data warehouse, and ML workloads. ODI handles ETL between operational systems and the analytics layer. This reference architecture demonstrates how governments can unify citizen services across multiple departments using Oracle Fusion Middleware while maintaining security boundaries through DMZ segmentation. Fork this diagram on Diagrams.so to adapt the integration patterns for your own multi-agency platform or explore alternative ESB topologies.