W3C Language Overview

Ported from Alex Zhornyak's SCXML tutorial collection and the W3C SCXML Recommendation.

This ports the W3C SCXML Language Overview into a runnable browser example. The external include is inlined, and the external CCXML/VoiceXML portion is represented by browser-driven events so the whole flow can run in SCION.

SCXML source

<?xml version="1.0" encoding="us-ascii"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml"
       version="1.0"
       initial="Main"
       datamodel="ecmascript">
  <state id="Main" initial="Test1">
    <state id="Test1" initial="Test1Sub1">
      <onentry>
        <send event="trace">
          <content expr="'Inside Test1'"/>
        </send>
      </onentry>

      <state id="Test1Sub1">
        <onentry>
          <send event="trace">
            <content expr="'Inside Test1Sub1'"/>
          </send>
        </onentry>
        <onexit>
          <send event="trace">
            <content expr="'Leaving Test1Sub1'"/>
          </send>
        </onexit>
        <transition event="Event1" target="Test1Sub2"/>
      </state>

      <final id="Test1Sub2"/>

      <transition event="done.state.Test1" target="Test2"/>

      <onexit>
        <send event="trace">
          <content expr="'Leaving Test1'"/>
        </send>
      </onexit>
    </state>

    <state id="Test2" initial="Test2Sub1">
      <state id="Test2Sub1">
        <onentry>
          <send event="trace">
            <content expr="'Inside Test2Sub1'"/>
          </send>
        </onentry>
        <transition event="Event2" target="Test2Sub2"/>
      </state>

      <final id="Test2Sub2"/>
      <transition event="done.state.Test2" target="Test3"/>
    </state>

    <state id="Test3" initial="Test3Sub1">
      <state id="Test3Sub1">
        <onentry>
          <send event="trace">
            <content expr="'Inside Test3Sub1; waiting for Timer'"/>
          </send>
          <send event="Timer" delay="5s" id="Timer"/>
        </onentry>
        <transition event="Timer" target="Test4"/>
        <onexit>
          <send event="trace">
            <content expr="'Leaving Test3Sub1'"/>
          </send>
        </onexit>
      </state>

      <onexit>
        <send event="trace">
          <content expr="'Leaving Test3'"/>
        </send>
      </onexit>
    </state>

    <state id="Test4" initial="Test4Sub1">
      <onentry>
        <send event="trace">
          <content expr="'Inside Test4'"/>
        </send>
      </onentry>

      <state id="Test4Sub1">
        <onexit>
          <send event="trace">
            <content expr="'Leaving Test4Sub1'"/>
          </send>
        </onexit>
        <transition target="Test5"/>
      </state>
    </state>

    <state id="Test5" initial="Test5P">
      <onentry>
        <send event="trace">
          <content expr="'Inside Test5; entering parallel state'"/>
        </send>
      </onentry>

      <parallel id="Test5P">
        <state id="Test5PSub1" initial="Test5PSub1Final">
          <final id="Test5PSub1Final"/>
        </state>
        <state id="Test5PSub2" initial="Test5PSub2Final">
          <final id="Test5PSub2Final"/>
        </state>
        <onexit>
          <send event="trace">
            <content expr="'All parallel states done'"/>
          </send>
        </onexit>
      </parallel>

      <transition event="done.state.Test5P" target="Test6"/>
    </state>

    <state id="Test6" initial="Dialing">
      <datamodel>
        <data id="dest" expr="'tel:+18315552020'"/>
        <data id="src" expr="'helloworld2.vxml'"/>
        <data id="formid" expr="'HelloWorld'"/>
      </datamodel>

      <state id="Dialing">
        <onentry>
          <send event="external.createcall">
            <content expr="dest"/>
          </send>
        </onentry>
        <transition event="external.connected" target="Prompting"/>
      </state>

      <state id="Prompting">
        <onentry>
          <send event="external.prompt">
            <content expr="'Hello World!'"/>
          </send>
        </onentry>
        <transition event="external.prompt.done" target="StartingSecondForm"/>
      </state>

      <state id="StartingSecondForm">
        <onentry>
          <send event="external.formstart">
            <content expr="{src: src, id: formid}"/>
          </send>
        </onentry>
        <transition event="external.second.done" target="Disconnecting"/>
      </state>

      <state id="Disconnecting">
        <onentry>
          <send event="external.disconnect"/>
        </onentry>
        <transition event="external.disconnected" target="Done"/>
      </state>

      <transition event="send.failed" target="Done">
        <send event="trace">
          <content expr="'External component failed'"/>
        </send>
      </transition>

      <onexit>
        <send event="trace">
          <content expr="'Finished with external component'"/>
        </send>
      </onexit>
    </state>

    <final id="Done"/>
  </state>
</scxml>