/a>
      </td>
      <td>
        <p>Sets <code>required</code> validation error key if the value is not entered.</p>

        
      </td>
    </tr>
    
    <tr>
      <td>
        ngRequired
        
        <div><em>(optional)</em></div>
      </td>
      <td>
        <a href="" class="label type-hint type-hint-string">string</a>
      </td>
      <td>
        <p>Adds <code>required</code> attribute and <code>required</code> validation constraint to
   the element when the ngRequired expression evaluat