<?xml version="1.0"?>
<grammar xmlns="http://www.w3.org/2001/06/grammar" xml:lang="en-US" version="1.0" mode="voice" root="digit">
  <rule id="digit">
    <one-of>
      <item>one</item>
      <item>two</item>
      <item>three</item>
    </one-of>
  </rule>
</grammar>