ECMA Script During Transition

The following SCXML strategy uses an ECMA script fragment in transitioning from one state to another.

<scxml version="1.0" xmlns="http://www.w3.org/2005/07/scxml" 
        xmlns:queue="www.genesyslab.com/modules/queue" 
        xmlns:dialog="www.genesyslab.com/modules/dialog" 
        initial="initial">
  <script>
    var DN = "";
    var DNPreffix = "710";
  </script>
  <state id="initial">
    <transition event="interaction.added" target="routing">
      <script>
        for (var i = 0; i < 3; i++)
          DN = DNPreffix + i;
      </script>
    </transition>
  </state>
  <state id="routing">
    <onentry>
      <queue:submit priority="5" timeout="20">
        <queue:targets type="dn">
          <queue:target name="DN"/> 
        </queue:targets>
      </queue:submit>
    </onentry>
    
    <transition event="queue.submit.done" target="exit">
      <log expr="'DONE'"/>
      <log expr="_genesys.ixn.interactions[0].voice.ani"/>
      <log expr="'DONE'"/>
      <log expr="_event.data.targetselected"/>
    </transition>
    <transition event="error.queue.submit" target="error"/>
  </state>
  
  <final id="exit"/>
  <final id="error"/>
</scxml>