ode><a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-duration">duration</a></code>
        </code>
      </p>

      <p>
        All properties are optional (including the <code>id</code> and
        <code>type</code>).
      </p>

<figure>
  <figcaption>
    Following is an example Object that uses the <code>id</code> and
    <code>type</code> properties to express the global identifier and object
    type:
  </figcaption>

<div id="ex4-jsonld" style="display: block;">
<pre class="example hig