Having gained an understanding of the SimpleOrder implementation level architecture, let's now discuss the services level of the architecture.

The SimpleOrder services view provides a description of the architecture when analyzed from the services point-of-view. The SimpleOrder solution, in its endeavor to align with service-oriented (SOA) architecture, has been developed using a business service realization framework. This framework is built on top of a meta-model, consisting of the service provider layer, business model layer, persistence layer, and adaptor layers. The service provider layer exposes the business services that are based on open standard WSDL. It also implements Web Services using standard protocols like SOAP/HTTP (S) support at transport level.

Let's now take a look at the realized services supported by SimpleOrder.