The OnLine Help said:"You can implement it by sending HTTP requests to a special URL. The URL identifies a servlet that accepts the request and authenticates the requesting user's identity and credentials before authorizing the information exchange. The servlet then parses the request, which is encoded in XML, performs the operations, and returns the results in either XML or CSV format (CSV is the default)."
Now I have the request codes but I can't find the servlet code that the URL identifies, so I came here for help,you can get touch with me by wangli@water.pku.edu.cn, Thanks!
