Opts an element out of specific ReSpec processing.

<p>
  <abbr class="exclude" title="Application Programming Interface">API</abbr>
  is not automatically expanded here.
</p>

<aside class="example" title="Hypothetical API">
  <pre class="idl exclude">
  interface Example {
    undefined hypotheticalMethod();
  };
  </pre>
</aside>

• Use on IDL blocks that are illustrative examples, not normative definitions that should appear in the IDL index
• The .exclude class does not prevent the element from being rendered — it only opts out of specific ReSpec transformations