A Composite Service is a service whose implementation calls other services.
A Composite Service in Composition Studio refers to an 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 BPELs and have bindings to other services. exposed by other modules.
When you import a Composite Service, you create endpoints 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 Required Optional Dimensions. However it is also desirable that you update your simulation when you update your context specification.