There must be no more than one document record per system file. Document records must follow the variable records and precede the dictionary termination record.
struct sysfile_document { int32 rec_type; int32 n_lines; char lines[/* variable length */][80]; };
int32 rec_type;
int32 n_lines;
char lines[/* variable length */][80];
n_lines
.
Lines shorter than 80 characters are padded on the right with spaces.