RequestCommonFlow is used for Web services that do not support groups. It resembles the default Access Gateway request message processing flow, except that it does not include the Group Resolution mediation primitive.
As the figure shows, a typical RequestCommonFlow subflow includes an input node (in) followed by a sequence of TWSS mediation primitives, an output node (out), and a failure node (out_Fail). In TWSS default flows the output node is connected to the Callout node of the main flow and the failure node is connected to the RequestFailureFlow subflow. (Refer to the topic RequestFailureFlow for a complete description of that subflow.)