IBM standard user labels (UHL1-UHL8 or UTL1-UTL8)

The IBM^® standard user labels (UHL1-UHL8 or UTL1-UTL8) is 80 bytes in length. The program uses them to identify additional information about the data set.

Table 1. Format of the IBM standard user labels (UHL1-UHL8 or UTL1-UTL8)
Offset	Data type	length	contents
0	Character	3	Label identifier
3	Character	1	Label number
4	Character	76	User data

All information in the user labels is user data. The user labels directly follow the header/trailer group and can be up to 8 user labels per data set.

The program describes the contents and function of each of the fields below.

Label identifier
The characters identify the type of data set label.
UHL

User Header Label (the beginning of a data set)

UTL

User Trailer Label (the end of a data set)
Label number
The relative position of this label within the set of labels of the same type; there is a limit of 8 user labels per data set.
User data
This field specifies any user information in the user label. The program ignores the information in this set but passes it to a specified user label program.