Enterprise Application Integration (EAI) is key to connecting business applications with heterogeneous systems. Over the years, architects of integration solutions have invented their own a blend of patterns in a variety of ways. But most integration patterns for connecting various business applications within enterprise systems. Most of these architectures have similarities, initiating a set of widely accepted standards in architecting integration patterns. Most of these standards are described in the Enterprise Integration Patterns Catalog available at: http://www.eaipatterns.com/toc.html.
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