NOVELTY - The frame (10-1) has an upper transverse profile rail (25) comprising an outer edge profile (203) arranged at base bodies (25-2, 220), which comprise a support surface (211) for supporting the profile rail on a lower transverse profile rail (28) of another frame (10-2). A connection profile (221) is arranged at the base body at a high plane (H1) in a side facing the outer edge profile. The connection profile has a recess (230) to retain a connecting web for the lower transverse profile rail. A recess aperture (231) points toward a surface (205) of the outer edge profile.    USE - Frame for installing a plate-like functional element e.g. thermal generator module, thermal solar collector, and photovoltaic module, on a cover system i.e. roof system (all claimed), of a building.    ADVANTAGE - The frame allows for forming a cover system in a simple and time-efficient manner. The frame is mounted in a safe manner, so that the functional element is installed in a safe and easy manner. The frame is tightly integrated with other frames to form the roof, so that fluctuations of the ambient temperature and/or the heat entry by sun rays, caused by thermal expansion of the individual frames, are compensated, thus preventing or reducing the mechanical stresses on the cover system, and preventing the load at the attachment points of the cover system due to thermal fluctuations, and hence reducing damages of the functional elements caused by the temperature fluctuations, and allowing the functional elements to be formed from glass layers.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a cover system.    DESCRIPTION OF DRAWING(S) - The drawing shows a lateral cross-sectional view of a positive connection between an upper transverse profiled rail of a frame and a lower transverse profiled rail of another frame of adjacent functional elements.    High plane (H1)    Frames (10-1, 10-2)    Upper transverse profile rail (25)    Base bodies (25-2, 220)    Lower transverse profile rail (28)    Outer edge profile (203)    Surface of outer edge profile (205)    Support surface (211)    Connection profile (221)    Recess (230)    Recess aperture (231)