The lines of the file header contain the following data:
VDA version name of sender company.
contact person.
telephone no.
address.
file name.
The last record in a file must be the trailer END . The trailer name corresponds to the header name.
The total transferred data volume between header and trailer identification is designated as a file. The file consists of records, each with 80 characters in ASCII (American National Code for Information Interchange) code.
The records contain positive sequence numbers right-justified in columns 73 to 80. These numbers are in ascending order.
The logical parts of the file are header, geometrical and structural elements, data transformations as well as comments and trailer.