Grammar Slots

The grammar slotnames, if not explicitly defined in the originating <field>, will default to the fieldname itself. The use of grammar slots comes in handy when we want to reuse a grammar in more than one <field>, as evidenced in the example below:

GrammarSlot.vxml

<?xml version="1.0"?> 

<vxml version="2.0"> 
  <form> 

    <field name="F_1" slot="MySlot"> 
      <grammar src="GrammarFile.gsl#MYRULE" type="text/gsl"/> 
      <prompt> 
        what is your favorite cheese? 
      </prompt> 

        <filled>
         <prompt>  
          You said <value expr="F_1$.interpretation.MySlot"/> 
         </prompt> 
          <goto nextitem="F_2"/>
        </filled> 

    </field> 

    <field name="F_2" slot="MySlot"> 
      <grammar src="GrammarFile.gsl#MYRULE" type="text/gsl"/> 
      <prompt> 
        what is your least favorite cheese? 
      </prompt> 

      <filled>
       <prompt>  
        You said <value expr="F_2$.interpretation.MySlot"/> 
       </prompt> 
      </filled> 

    </field> 
  </form> 
</vxml>

GrammarFile.gsl

MYRULE     [ 
[cheddar]                            {<MySlot "cheddar">} 
(?monteray jack)                     {<MySlot "jack">} 
(+stinky french cheese)             {<MySlot "stinky">} 
                ]

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Universal Grammars

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