title: What is the meaning of this tag: <t>lorem ipsum</t>
body: <p>The template page <a href="http://www.blacktie.co/demo/kelvin" rel="noreferrer">http://www.blacktie.co/demo/kelvin</a> contains a tag I haven't seen before: <code>&lt;t&gt;Email&lt;/t&gt;</code></p>
  
  <p>The corresponding CSS styles this: <code>#footwrap t {font-weight: 700;}</code></p>
  
  <p>I'm curious as to the significance of the <code>&lt;t&gt;</code>. It's not listed at <a href="http://htmldog.com/reference/htmltags" rel="noreferrer">http://htmldog.com/reference/htmltags</a> or other lists I can find.</p>
  
  <p>Is this a custom HTML tag? From what I've read about custom elements (eg <a href="http://www.html5rocks.com/en/tutorials/webcomponents/customelements" rel="noreferrer">http://www.html5rocks.com/en/tutorials/webcomponents/customelements</a>) you need to call <code>document.registerElement()</code> or <code>document.createElement()</code> but this doesn't seem to be the case here.</p>
  
  <p>Is this code semantically correct, or should it be written as:</p>
  
  <pre><code>&lt;span class="t"&gt;Email&lt;/span&gt;
  
  #footwrap .t {font-weight: 700;}
  </code></pre>