  </p>

      <p>
        In addition to the base properties inherited by all
        <code><a data-lt="Object">Objects</a></code>, all
        <code><a>Collection</a></code> types contain the additional properties:
        <code>
          <a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-items">items</a> |
          <a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-totalitems">totalItems</a> |
          <a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-first">first</