select1

• Choose exactly one item from a list

• May be implemented as radio buttons, choice menu, something else

<select1 ref="cc:type">
  <label>Credit Card</label>
  <item>
    <label>American Express</label>
    <value>amex</value>
  </item>
  <item>
    <label>Visa</label>
    <value>visa</value>
  </item>
  <item>
    <label>Mastercard</label>
    <value>mc</value>
  </item>
</select1>