Listing 1

[airlineDirMain.vxml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<!--
	This is the main dialog and first in the flow
	We add the application= here to allow application level variables to 
	be referenced from anywhere. We'll use them elsewhere
-->
<vxml application="airlineDirMain.vxml" version="1.0">
  
  <!-- numberId is the airline id -->
  <var name="numberId"/>
  
  <!-- lastForm is utilized for state management in error handling page -->
  <var name="lastForm"/>
  
  <form id="welcome">
    <block name="gotoFirstGroup">
	<audio src="prompts/greeting.wav"/>
	<goto next="firstGroupSel.vxml"/>
    </block>
  </form>

  <form id="farewell">
    <block name="terminate">
	<audio src="prompts/farewell.wav"/>
      <exit/>
    </block>
  </form>
</vxml>

[firstGroupSel.vxml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<vxml application="airlineDirMain.vxml" version="1.0">

  <!-- variable local to this dialog and the airline the user selects -->
  <var name="numberChoice"/>

  <form id="selectAL">
  	<!-- we're going to fill the field numberChoice with the proper value -->
  	<field name="numberChoice">
		<!--Allow the user to barge into the menu if he already knows what he wants-->
		<prompt bargein="true">
			<!--relative path to the audio prompt -->
			<audio src="prompts/firstGroup.wav"/>
		</prompt>
		<!-- This is a static inline grammar -->
		<grammar> 
			<![CDATA[[
	    		(alaska airlines) {<numberChoice "alaska_airlines">} 
	    		(america west) {<numberChoice "america_west">} 
	    		(american airlines) {<numberChoice "american_airlines">} 
	    		(continental airlines) {<numberChoice "continental_airlines">} 
	    		(delta airlines) {<numberChoice "delta_airlines">}
	    		(next)	{<numberChoice "next">}
			(exit)	{<numberChoice "exit">}
			]]]> 
	  	</grammar>
		<noinput>
			<!-- 
				TTS prompt. If you were utilizing a prerecorded audio file, it
				would be in the form as below.
			-->
			<!--audio src="Myfile.wav"/-->
			Sorry. I didnt hear anything
		</noinput>

		<nomatch>
			<!--audio src="MyFile.wav"/-->
			I didnt understand that selection. Please try again.
		</nomatch>

		<!-- 
			Here we catch and exception if the user makes two errors. Note so.MaxErrorsExceededException
			This is the only speech object we utilize. We then redirect to the error handling page
			with lastForm = 1, i.e. firstGroupSel.vxml. We are remembering where we came from.
		-->
		<catch event="error.semantic.vcommerce.so.MaxErrorsExceededException">
		      	<assign expr="1" name="lastForm"/>
		      	<goto next="error.vxml"/>
	    	</catch>

	</field>
  	<!--  now we're going to fill the numberId app variable with the proper ID -->
	<filled>
	      <assign expr="numberChoice" name="numberChoice"/>
	      <if cond="numberChoice==&apos;alaska_airlines&apos;">
			<assign expr="101" name="numberId"/>
	      <elseif cond="numberChoice==&apos;america_west&apos;"/>
			<assign expr="102" name="numberId"/>
	      <elseif cond="numberChoice==&apos;american_airlines&apos;"/>
			<assign expr="103" name="numberId"/>
	      <elseif cond="numberChoice==&apos;continental_airlines&apos;"/>
			<assign expr="104" name="numberId"/>
	      <elseif cond="numberChoice==&apos;delta_airlines&apos;"/>
			<assign expr="105" name="numberId"/>
	      <elseif cond="numberChoice==&apos;next&apos;"/>
			<assign expr="2" name="numberId"/>
	      <elseif cond="numberChoice==&apos;exit&apos;"/>
			<assign expr="3" name="numberId"/>
	      <elseif cond="numberChoice==&apos;next&apos;"/>
			<goto next="secondGroupSel.vxml"/>
	      </if>
	      
	      <!-- Decide which dialog comes next by the numberId variable -->
	      <if cond="numberId&gt;100">
		<goto next="playNumber.vxml"/>
	      <elseif cond="numberId==2"/>
			<goto next="secondGroupSel.vxml"/>
	      <elseif cond="numberId==3"/>
				<goto next="airlineDirMain.vxml#farewell"/>
		</if>

	</filled>
  </form>
</vxml>

[secondGroupSel.vxml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<!-- 
	This page is a duplication of firstGroupSel.vxml, except it is the second group of choices.
	See firstGroupSel.vxml for complete comments.
-->
<vxml application="airlineDirMain.vxml" version="1.0">
	<var name="numberChoice"/>
	<form id="selectAL">
		<field name="numberChoice">
			<prompt bargein="true">
				<audio src="prompts/secondGroup.wav"/>
			</prompt>
			<grammar>
				<![CDATA[[
		    		(midwest airlines) {<numberChoice "midwest_airlines">} 
		    		(southwest airlines) {<numberChoice "southwest_airlines">} 
		    		(tee double you ay) {<numberChoice "t_w_a">} 
		    		(united airlines) {<numberChoice "united airlines">} 
		    		(u s air) {<numberChoice "u_s_air">}
				(exit)	{<numberChoice "exit">}
		    		(back)	{<numberChoice "back">}
				]]]> 
			</grammar>
		
			<noinput>
				<!--audio src="Myfile.wav"/-->
				Sorry. I didnt hear anything
			</noinput>

			<nomatch>
				<!--audio src="MyFile.wav"/-->
				I didnt understand that selection. Please try again.
			</nomatch>

	
			<catch event="error.semantic.vcommerce.so.MaxErrorsExceededException">
				<assign expr="2" name="lastForm"/>
				<goto next="error.vxml"/>
			</catch>
		</field>
		<filled>
  
			<assign expr="numberChoice" name="numberChoice"/>
			<if cond="numberChoice==&apos;midwest_express&apos;">
				<assign expr="106" name="numberId"/>
			<elseif cond="numberChoice==&apos;southwest_airlines&apos;"/>
				<assign expr="107" name="numberId"/>
			<elseif cond="numberChoice==&apos;t_w_a&apos;"/>
				<assign expr="108" name="numberId"/>
			<elseif cond="numberChoice==&apos;united_airlines&apos;"/>
				<assign expr="109" name="numberId"/>
			<elseif cond="numberChoice==&apos;u_s_air&apos;"/>
				<assign expr="110" name="numberId"/>
			<elseif cond="numberChoice==&apos;back&apos;"/>
				<assign expr="4" name="numberId"/>
			<elseif cond="numberChoice==&apos;exit&apos;"/>
				<assign expr="3" name="numberId"/>
		      </if>

		      <if cond="numberId&gt;100">
				<goto next="playNumber.vxml"/>
		      <elseif cond="numberId==4"/>
				<goto next="firstGroupSel.vxml"/>
		      <elseif cond="numberId==3"/>
				<goto next="airlineDirMain.vxml#farewell"/>
		      </if>
	    
		</filled>
	</form>
</vxml>

[playNumber.vxml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<vxml application="airlineDirMain.vxml" version="1.0">
  <form id="playNumber">
	<block>
      	<!-- 
		numberId was defined globally. The submit tag results in the gateway creating an HttpRequest
		the method here is get, could be "post". namelist is an attribute of submit as is next.
		All this information is handled by the DirectoryServlet.
	-->
      	<submit method="get" namelist="numberId" next="http://12.35.244.76/Scripts/SaISAPI.dll/Voice.class/DirectoryServlet"/>
	</block>
  </form>
</vxml>

[error.vxml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<vxml application="airlineDirMain.vxml" version="1.0">
  <form id="returnLast">
    <block name="returnHandler">
	<audio src="prompts/error.wav"/>
      <!-- 
      	    here's where the app level variable lastForm comes into play. We'll
	    manage state from this. Where did we come from???
      -->
      <if cond="lastForm == 1">
	      <goto next="firstGroupSel.vxml#selectAL"/>
      </if>
      <if cond="lastForm == 2">
      	<goto next="secondGroupSel.vxml#selectAL"/>
      </if>
    </block>
  </form>
</vxml>

[dynamic vxml]

<!DOCTYPE vxml PUBLIC "-//Nuance/DTD VoiceXML 1.0b//EN" "http://community.voxeo.com/vxml/dtd/nuancevxml12.dtd">
<vxml version="1.0">
<form>
<block>
<prompt bargein="false">
The number for Continental Airlines is 1, 800, 5 2 5, 0 2 8 0
</prompt>
</block>
<block name="nextDialog">
<goto next="firstGroupSel.vxml#selectAL"/>
</block>
</form>
</vxml>