Abstract: A method for assigning access rights in a database server operating in a multi-tier computer architecture comprises granting a database connection user execution rights to execute a gatekeeper function of the database server. The gatekeeper function is executable to extract session related data and request data from an XML database request message provided by the database convection user. The gatekeeper function is further executable to execute an authentication function for authenticating the session related data. An owner of the authentication function is granted rights to call one or more stored procedures identified by the session related data, responsive to the session related data being successfully authenticated.

Abstract: A method for implementing an XML stylesheet in a multi-tiered architecture, the method comprising: retrieving an XML stylesheet associated with a page to be rendered on a presentation interface; and implementing the XML stylesheet to facilitate XML messaging between different logic layers of the multi-tiered architecture for carrying out one or more logic functions associated with the rendered page.

Abstract: The present invention provides a system and method of controlling a vehicle. The method includes the steps of: Providing a transmitter arranged to transmit in the microwave frequency range; providing a receiving means on the vehicle, receiving the signal, and calculating the azimuth of the transmitter with respect to the vehicle. The vehicle is controlled based on the calculated azimuth.