The limousine body style has a partition separating the driver from the rear passenger compartment.[6][8] This partition usually contains a sliding (often soundproof) glass window so that conversations between passengers in the rear compartment may be kept private from the chauffeur. Communication with the driver is possible either by opening the window in the partition or by using an intercom system. Alternative versions of the style include the limousine-landaulet, with a removable or folding roof section over the rear passenger seat, and the limousine de-ville, with a solid roof over the rear passengers but a removable or folding roof section over the driver's seat.[