CASE: Case control option

You can control the binder's sensitivity to case by coding the CASE option as follows:

CASE={UPPER | MIXED}

The case can be either UPPER or MIXED. When CASE=MIXED is specified,

The binder distinguishes between upper and lower case letters, treating two strings as different if their cases do not match exactly.
The binder does not convert any lowercase letters in names encountered in input modules, control statements, and binder options.

Binder keywords are always converted to upper case.

CASE=UPPER is the default value, causing conversion of all lower case letters to upper case during binder processing.