9.2.6. Pageflow composition

It is possible to compose pageflows so that one pageflow pauses while another pageflow executes. The <process-state> node pauses the outer pageflow, and begins execution of a named pageflow:

<process-state name="cheat">
  <sub-process name="cheat"/>
  <transition to="displayGuess"/>
</process-state>

The inner flow begins executing at a <start-state> node. When it reaches an <end-state> node, execution of the inner flow ends, and execution of the outer flow resumes with the transition defined by the <process-state> element.