The application presentation server sends the request to the Business Process Component on the application logic server through the WSIF action or the EJB action. The HTML Sample can use the work area if you deploy the sample on WebSphere(R) Business Integration Server Foundation, therefore the Business Process Component can get the session information for this request from the work area. If you do not deploy the HTML Sample on WebSphere Business Integration Server Foundation, the application presentation server adds the Session ID, sub-Session ID, and the context name to the WSIF message and sends the WSIF message to the Business Process Component.