1. A method in a data processing system for executing a converged Web services application with call flow interactions, the method comprising: receiving an extended description language document that describes one or more Web services interface components, has embedded therein a call flow description for one or more call flow segments, and includes at least one call flow binding, wherein the at least one call flow binding associates an interaction operation with a binding point in a given call flow segment within the one or more call flow segments; selecting one or more message exchanges from the one or more call flow segments; automatically generating an implementation for each of the one or more selected message exchanges to form an application template; providing business logic in the application template for the one or more Web services interface components to form a converged application; and executing the converged application.