recommended for this purpose.</li>
  <li>Tools that process design token files <em class="rfc2119">MUST</em> preserve any extension data they do not themselves understand. For example, if a design token contains extension data from tool A and the file containing that data is opened by tool B, then tool B <em class="rfc2119">MUST</em> include the original tool A extension data whenever it saves a new design token file containing that token.</li>
  </ul>
  <aside class="example" id="example-3"><div class="mar