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

 

The IBM^® standard user labels (UHL1-UHL8 or UTL1-UTL8) are 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.

 

Parent topic:

Volume label fields