/sys$common/syshlp/helplib.hlb SET, SYMBOL, Qualifiers, /SCOPE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SCOPE=(keyword,...)

    Controls access to local and global symbols. Lets you treat
    symbols as being undefined. Possible keywords are as follows:

    NOLOCAL    Causes all local symbols defined in outer procedure
               levels to be treated as being undefined by the current
               procedure and by all inner procedure levels.

    LOCAL      Removes any symbol translation limit set by the current
               procedure level.

    NOGLOBAL   Causes all global symbols to be inaccessible to the
               current procedure level and to all inner procedure
               levels unless otherwise changed.

    GLOBAL     Restores access to all global symbols.