Development tooling receives the extended Web services description language with call flow interactions. The development tooling allows the user to select trivial message exchanges in the call flow. The development tooling may generate servlets for the selected message exchanges automatically to form a template form of the application that will execute in the converged application engine. Alternatively, the development tooling may generate a template form of the application that may be interpreted in an interpretive engine. The user may then drop in higher level business logic. The automatically generated servlets, or template form of the application to be interpreted, are configured to pass to the Web services information, including the last message contents.