399. The aim of the document is to give at first an overview about Web Service Fundamentals with the focus to define after this a layer model for a common Enterprise Service Bus (ESB). Furthermore a draft proposal of an Enterprise Service Bus (ESB) / Enterprise Message System (EMS) Profile is defined based on this common ESB / EMS layer model.

400. At the end the document contains some hints related of the usage of an ESB in the military environment with a look-out on a federated ESB architecture.