e-commerce GXS and trading hubs VANs and e-marketplace trading hubs EAI (Enterprise Application Integration) best practices hubs, integration and XML and EAI broker, connection economic drivers, integration and economy, integration and EDI transformation transportation XML and EDI VAN, dependency endpoints abstract service container and service oriented architecture and RME (Rejected Message Endpoint) service, messaging and energy companies adopting ESB Enrich step, VETO integration pattern enterprise integration connectivity enterprises ESB propagation event-driven, SOA extended 2nd extended enterprises EPCglobal, RFID tags and error handling ESB (Enterprise Service Bus) adoption by industry energy/utility company adoption evolution financial services adopting food distribution networks adopting insurers adopting as integration backbone introduction, project level manufacturers adopting propagation refactoring to requirements, IT and retailers adopting services configuration telecommunications adoption and vendors and ETL (Extract, Transform, and Load) batch updates and bulk data transfer and data validity drawbacks 2nd integration and 2nd reliability event-driven enterprises, SOA event-driven SOA evolution of ESB exactly-once delivery extended enterprises 2nd 3rd extensibility layered services and XML external protocols, MOM backbone and