The <i>ifndef</i> tag allows for optional processing to occur if a tag is NOT defined. If the tag is defined, the body of the tag is not processed.<br>


  <pre>
  &lt;i18n:ifndef key="USONLY"&gt;
     Only users specifying something OTHER than en-US\
     as their locale will see this!
  &lt;/i18n:ifndef&gt;
  </pre>
  <i>
  <i18n:ifndef key="USONLY">
     Only users specifying something OTHER than en-US\
     as their locale will see this!
  </i18n:ifndef>
  </i>