Library /sys$common/syshlp/mailhelp.hlb DEFINE, /KEY, Qualifiers, /SET_STATE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SET_STATE=state
       /NOSET_STATE

    Associates a state with the key you are defining. A state name
    can be any alphanumeric string. If you omit or negate this
    qualifier, the current state remains unchanged. You cannot define
    a key specifying both the /SET_STATE and /TERMINATE qualifiers.

    States are used to increase the number of key definitions
    available on your terminal. The same key can be assigned any
    number of definitions as long as each definition is associated
    with a different state.