A composite service is a service whose implementation calls other services.
A composite service in Composition Studio refers to a System Component Architecture (SCA) module. A composite service may be as simple as an SCA module that implements and exposes a web service or it may include complex Business Process Execution Language (BPEL) programs and have bindings to other services exposed by other modules.
When you import a composite service, endpoints are created for export bindings that have a binding type of SCA or Web Service Bindings set to use the SOAP/HTTP protocol.
When you edit your selected context specification, the results will modify any open simulations that are currently pointing to the current Dynamic Assembly Component. You must ensure that you do not change the dimensions. It is also desirable that you update your simulation when you update your context specification.