1.php

<link rel="stylesheet" type="text/css" href="semantic/dist/semantic.min.css">
<script src="semantic/dist/semantic.min.js">
$('.ui.form')
  .form(
    fields: {
      name: {
        identifier : 'special-name',
        rules: [
          {
            type   : 'empty'
          }
        ]
      }
    }
  })
;
</script>

<form class="ui form segment error">
  <div class="field error">
    <label>Special Field</label>
    <input name="special-name" type="text">
  </div>
  <div class="ui blue submit button">Submit</div>
  <div class="ui error message"><ul class="list"><li>Special Field must have a value</li></ul></div>
</form>