w.w3.org/TR/activitystreams-vocabulary/">Activity Vocabulary</a>:
          <code><a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-id">id</a></code> |
          <code><a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-name">name</a></code> |
          <code><a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-hreflang">hreflang</a></code> |
          <code><a href="https://www.w3.org/TR/activitystreams-vocabulary/#dfn-mediatype">mediaType</a></code> |
          <code><a h