Use the New Service Wizard to define messaging and database services. You can add an operation, port type, and port as you are defining the service or define a service without an operation. You can also add new port types, operations, and ports to a service after it is defined. When the service is defined, two files are created in the Orchestration Navigator: one with a .wsdl extension and one with an .iface extension. The .iface file contains a default service interaction for the service.
Be prepared to provide the information listed in Defining a Messaging Service or Defining a Database Service. Special considerations for defining those services are also provided.