In the second section of the department data file, there is one line per non-zero interdepartmental relationship. Each line contains three fields. The fields are the from department, the to department codes, and the relationship between the from and to departments. The department codes must have been defined in the first section of the data file or must be equal to OUT, which indicates a relationship with the outside. The relationship can be positive or negative in the range [-32767, 32767]. To indicate the end of the list of non-zero relationships, the last line in the department data file must contain the following dummy relationship:
OUT OUT 0
The program will convert the asymmetric relationships to one symmetric one, i.e. the relationships from department 1 to department 2 and from department 2 to department 1 are added together to form a single relationship between departments 1 and 2.