It is not webflow, it is Webwork. Struts 2.x is merged with Webwork project.
Webwork is a framework which is mainly intended to provide webflows. Struts 2.x supports webflow as it is integrated with webwork, but not struts 1.x.
Here is what Webwork webflow is:
"WebWork dataflow environment, or WebFlow, allows WebWork users to design, run, test and monitor coarsegrain applications by directly assembling and interacting with the active visual graphs that represent compute-web topology." [ November 26, 2007: Message edited by: Jignesh Patel ]