A client interested in bookmarks SHOULD include the 'urn:xmpp:bookmarks:0+notify' feature in its &xep0115;, as per &xep0163;, so that it receives notifications for updates done by other clients of the user, and react accordingly. The actual notifications are explained in the Bookmark Notifications section of this specification.
+ +When a client is sent an event from the Pubsub service for the '&namespace;' node, it MUST check the 'autojoin' attribute if present, and join the room immediately if the attribute is both present and true.