Scenario (cont.)
Bob says, “activate IETM” in order to switch
grammars to the IETM grammar.
speech.interpreter.GlobalInterpreter.interpret()
speech.grammar.CentralGrammarHandler.
   setActiveGrammarHandler(IETMGrammarHandler)
Bob says, “next step” and the speech system speaks
the 1st step to him.
speech.CentralInterpreter.ActiveInterpreter.
interpret()
speech.IETMInterpreter.interpret()
speech.Synthesis.speakStep()