RFC 3343 (rfc3343) - Page 3 of 23

The Application Exchange (APEX) Presence Service

RFC 3343        The Application Exchange (APEX) Presence      April 2003


2. Use and Management of Presence Information

   Management of presence information falls into three categories:

   o  applications may update the presence information associated with
      an endpoint;

   o  applications may subscribe to receive presence information
      associated with an endpoint; and,

   o  applications may find out who is subscribed to receive presence
      information.

   Each is now described in turn.

2.1 Update of Presence Information

   When an application wants to modify the presence information
   associated with an endpoint, it sends a publish operation to the
   service, e.g.,

       +-------+                  +-------+
       |       | -- data -------> |       |
       | appl. |                  | relay |
       |       | <--------- ok -- |       |
       +-------+                  +-------+

     C: 
            
            
            
                
                    
                        
                        
                    
                
            
        
     S: 





Rose, et al.                  Experimental