title: Amazon Lex "slots" for alphanumeric values
body: <p>I have simple ask, how do I create a Amazon Lex slot for Alphanumeric values.</p>
  
  <p>So far I have tried - </p>
  
  <blockquote>
    <ul>
    <li><strong>AMAZON.Number</strong>: only takes decimal numbers </li>
    <li><strong>AMAZON.PostalAdress</strong>: takes
    everything except numbers </li>
    <li><strong>Custom Slot with no values</strong>: Only numbers</li>
    </ul>
  </blockquote>
  
  <p>Is there any way to create a slot which takes alphanumeric values?</p>
  
  <p>Thanks</p>