Database Synchronization for Logistics

This is basically multiple database synchronization for Logistic company. The database servers get regularly updated with the latest data and the data flow is bidirectional. The system has two main sections, one is Client and other is Server (Web Service). The remote webservice has some objects exposed to internet and the client calls those remote objects for communication. The Client application selects records from the Local database and sends to server database in XML format by calling the web methods of webservice. The web method also replies back with the new records (meant for client database) from server database in XML format. The records are manipulated (inserted or updated) as per requirement.