User file header labels (UHL)

The user file header labels are optional.

Format

Position	Field name	Length	Contents
1 – 3	Label identifier	3	UHL
4	Label number	1	“a” characters; must be defined by the user. BS2000: “b” characters.
5 – 80	Reserved for the user	76	There are no conventions or restrictions with regard to the recording and contents of this field.

BS2000 supports up to 255 user file header labels. The label number (position 4) is defined by the user.