DTMF Grammars

DTMF grammars follow the same rules for spoken word grammars. The best practice for writing your application is to ignore the legacy <dtmf> element and define your DTMF grammars within the <grammar> element in order to be prepared for the VoiceXML 2.1 standard, as the dtmf element is deprecated in the VoiceXML 2.1 environments:


<grammar type="text/gsl"> 
<![CDATA[ 
[
  [(dtmf-1)] {<F_1 "one">}
  [(dtmf-2) ] {<F_1 "two">}
 [(dtmf-3) ] {<F_1 "three">}
] 
]]> 
</grammar>

I am sure that it would be helpful to see this in action to cement this little factoid into you head....
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Yea that would be nice
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Well thats to bad!
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Just joking, =) here you go!!!


<?xml version="1.0" encoding="UTF-8"?>
<vxml version = "2.1">
<meta name="maintainer" content="your_email_address@wherever.com"/>

<form id="guessNumber">
    	
	 <field name="F_1" slot="MySlot"> 
		 <prompt>
  		   Please punch in a number on your keypad.
   		 </prompt>

  		  <grammar type="text/gsl">
				<![CDATA[[
  					[(dtmf-1)] {<mySlot "one">}
  					[(dtmf-2) ] {<mySlot "two">}
					[(dtmf-3) ] {<mySlot "three">}
					[(dtmf-4) ] {<mySlot "four">}
					[(dtmf-5) ] {<mySlot "five">}
					[(dtmf-6) ] {<mySlot "six">}
					[(dtmf-7) ] {<mySlot "seven">}
					[(dtmf-8) ] {<mySlot "eight">}
					[(dtmf-9) ] {<mySlot "nine">}
					[(dtmf-0) ] {<mySlot "zero">}
					]
				]]>
		  </grammar>
			
      	<noinput>
      		<log expr="'****no input'"/>
      		<prompt>
        		I did not hear you. Please try again.
      		</prompt>
           	 <reprompt/>
    	</noinput>

    	<nomatch>
    		<log expr="'****no match'"/>
            <prompt>
        		Is that a number? Please try again.
     		</prompt>
      	 <reprompt/>
    	</nomatch>

      <filled>
        <prompt> 
          You chose <value expr="F_1$.interpretation.mySlot"/>
        </prompt>
         <exit/>
     </filled> 
    </field>
  </form>
 </vxml>

Download the code!

Download the source code

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GSL Grammar Slots

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