The reverse development of the notation can be found in the standards of the German Institute for Standardization (DIN e.V.) . In the spelling "Cabriolet" the term was defined in the German standard DIN 70011 from March 1959 and had to have a retractable or retractable folding top with upper and side window seals. In April 1978 this standard was incorporated in a revised form in DIN 70010. The term was given the spelling "Cabriolet", the folding top was defined as follows: The top can be folded back (on top or retractable), optional roll bars were expressly mentioned. The May 1990 edition stated: Roof, fixed or flexible with at least two positions: closed and open or removed. The current edition of the standard dates from March 2001.