 of these four actions are described in this
    specification.

<span><a name="section-2" href="#section-2">2</a>. Terminology</span>

    The key words &#34;MUST&#34;, &#34;MUST NOT&#34;, &#34;REQUIRED&#34;, &#34;SHALL&#34;, &#34;SHALL NOT&#34;,
    &#34;SHOULD&#34;, &#34;SHOULD NOT&#34;, &#34;RECOMMENDED&#34;, &#34;MAY&#34;, and &#34;OPTIONAL&#34; in this
    document are to be interpreted as described in <a href="http://fakehost/test/rfc2119">RFC 2119</a> [<a href="#ref-WORDS">WORDS</a>].

    &#34;SHOU