Variable naming convention
Variables are tokens within the command statements that are to be replaced with actual values immediately before the statement is run.
A variable name begins with a prefix character, which is usually an exclamation mark (!)
to avoid conflicts with HCL Workload Automation for Z variable substitution
(but this can be changed), and an optional termination character of a period (.). The variable
name must start with an alphabetic character, then it can consist of characters A-Z, 0-9, @, #, _
and the special characters £ and $. The special characters can be modified by using the
OPTIONS VARNAMES
statement. The name can be any length. However, if the
variables you create in Workload Automation Programming Language are also to be stored in
the HCL Workload Automation for Z JCL Variable
Tables, their names must also conform to the JCL Variable naming convention.