<grammar xmlns="...">
<rule id="yes">
<one-of>
<item>yes</item> <item>yeah</item> <item>you bet</item>
<item xml:lang="fr">oui</item>
</one-of>
</rule>
<rule id="no">
<one-of>
<item>no</item> <item>nope</item> <item>no way</item>
<item xml:lang="fr">non</item>
<item xml:lang="fr">pas question</item>
</one-of>
</rule>
<rule id="answer" scope="public">
<one-of>
<item> <ruleref uri="#yes"/> </item>
<item> <ruleref uri="#no"/> </item>
</one-of>
</rule>
</grammar>