title: vxml: defining grammars with equivalent inputs
body: <p>I am using an engine based on TellMe. I have seen examples of grammars where the user can say one of a few different things that are considered the same. However, all the examples i've seen have been for in-line grammars (which dont work with the vxml engine im using). I want to know how i can change my .grxml file to do this. This is the file:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;!-- created by Matthew Murdock. Grammars for speech rec menus --&gt;
  &lt;grammar xmlns="http://www.w3.org/2001/06/grammar" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/2001/06/grammar      http://www.w3.org/TR/speech-grammar/grammar.xsd" xml:lang="en" version="1.0" mode="voice" scope="dialog" tag-format="semantics/1.0.2006"&gt;
     &lt;rule id="keep"&gt;
        &lt;one-of&gt;
           &lt;item&gt;exit&lt;/item&gt;
           &lt;item&gt;exit the system&lt;/item&gt;
           &lt;item&gt;another&lt;/item&gt;
           &lt;item&gt;another mailbox&lt;/item&gt;
           &lt;item&gt;play&lt;/item&gt;
           &lt;item&gt;play back&lt;/item&gt;                      
        &lt;/one-of&gt;
     &lt;/rule&gt;
  &lt;/grammar&gt;
  </code></pre>
  
  <p>instead of having 6 items, i want to have 3 items, each having two possible utterances. Any ideas on how i can do this?</p>