ile-URI 0*( 1*SP profile-URI ) <">
profile-URI   = URI</"></"></pre>
            The "URI" in the above grammar refers to the "URI" as defined in
            Section 3 of [[!RFC3986]].
          </td>
        </tr>
        <tr>
          <td>Encoding considerations: </td>
          <td>
            Resources that use the "<code>application/activity+json</code>"
            Media Type are required to conform to all of the requirements
            for the "<code>application/json</code>" Media Type and are
   