<?xml version="1.0" encoding="UTF-8"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">

<meta name="description" content="simple grammar and simnple event handling example"/>
<meta name="author" content="OptimSys, s.r.o., Czech Republic (http://www.optimsys.cz)"/>
<meta name="copyright" content="free for any purpose"/>

<form id="start">
  <field name="answer">
    <noinput> Hey, don't sleep! </noinput>
    <nomatch> say 'yes' or 'no' </nomatch>

    <prompt> Are you sleepy? </prompt>

    <grammar root="main" tag-format="semantics/1.0-literals">
      <rule id="main" scope="public">
        <one-of>
          <item><ruleref uri="#yes"/><tag>yes</tag></item>
          <item><ruleref uri="#no"/><tag>no</tag></item>
        </one-of>
      </rule>
      <rule id="yes">
        <one-of>
          <item>yes</item>
          <item>yeah</item>
          <item>yep</item>
          <item>sure</item>
        </one-of>
      </rule>
      <rule id="no">
        <one-of>
          <item>no</item>
          <item>not</item>
          <item>nope</item>
        </one-of>
      </rule>
    </grammar>

    <filled>
      <if cond="answer=='yes'">
        So you are sleepy. Me too.
      <else/>
        So you are not sleepy. But I am.
      </if>
    </filled>
  </field>
</form>

</vxml>