You can create your own global variables with the SET GLOBAL command and use them in QMF commands as substitution variables. You can use your own global variables, or you can use the ones QMF provides. For a list of the QMF-provided global variables, see Appendix E. QMF Global Variable Tables.
To set a global variable for a procedure, do one of the following:
The variable name can be up to 18 characters long, and the length of the value can be up to 32 768 characters.