Library /sys$common/syshlp/lse$menu.hlb DECW search pref diacritical  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Specifies whether or not LSE exactly matches characters with
  diacritical markings when performing a search.

  The diacritical marks include the acute accent, grave accent,
  circumflex, tilde, macron, breve, hacek, umlaut, and cedilla.