. <a data-link-type="biblio" href="#biblio-rfc2119" title="Key words for use in RFCs to Indicate Requirement Levels">[RFC2119]</a>

    </p>
   <p>Examples in this specification are introduced with the words “for example”
    or are set apart from the normative text
    with <code>class="example"</code>,
    like this:

    </p>
   <div class="example" id="w3c-example">
    <a class="self-link" href="#w3c-example"></a>
        
    <p>This is an example of an informative example.
    </p>
   </div>
   <