The service flow project holds the resources associated with the service you are creating.
The related files are described at the end of this part of the tutorial. In this part of the tutorial, you choose options in the New Service Flow Project to create all these related files at the same time that the service flow project is created
The service flow project tools store the service flow project and the related files in subprojects and folders in the EST Project Explorer.
The operations file: A data file for storing operations. An operation provides access to the information required to invoke a flow or a nonterminal application (see Basic information about operations).
This is the input message file for the flow, which contains the input message of the flow. The input message contains the input parameters for the flow (see The input message of a flow).
This is the output message file for the flow, which contains the output message of the flow. The output message contains the output parameters returned by the flow (see The output message of a flow).
This is the variable message file for the flow, which contains the variable message of the flow. The variable message contains the general purpose variables for the flow and also any variables required by Extract actions, Insert actions, or recorded loops (see The variable message of a flow)
The host connection file: A data file containing the information needed to connect to the host (see Working with host connections).
See Creating a service flow project for more information on service flow projects.