How To?? asynch call webservice

[Suresh <su...@vergiltech.com>]

Hi All,
          How does the 
                    
                1) executeRequestResponseAsync(WSIFMessage input)
                and 
                2) executeRequestResponseAsyncWSIFMessage input,
                                                     WSIFResponseHandler handler).

        work??. 
                
                I understand that executeRequestResponseAsync with a handler, handles the response in a different thread of execution from the original
                request.The second executeRequestResponseAsync has handler registered for call back and returns a correlation id.
 
                What do i do with the id that i get back??.

                How does the first executeRequestResponseAsync work with fireAsyncResponse and processAsyncResponse methods??.

                How does WSIF handle document type services.
                
                Does some part of WSDL describe that a particular service has to be executed asynhcronously??.

                Where can i find more of asych invocation in axis

 Thanks a million in advance

suresh