Library /sys$common/syshlp/dbg$help.hlb DEBUG, SEARCH, Qualifiers, /IDENTIFIER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the debugger search for an occurrence of the
    string in the specified range but display the string only if
    it is not bounded on either side by a character that can be part
    of an identifier in the current language.