Library /sys$common/syshlp/tpuhelp.hlb ARB  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  ARB

     Returns a pattern that matches an arbitrary sequence of characters of
     the length you specify.  The characters themselves are arbitrary.

  Syntax

     pattern := ARB (integer)

  Parameters

     integer    The number of characters in the pattern, starting at the
                current character position.

  Example

     pat1 := ARB (5);

     Creates a pattern matching the next 5 characters starting at the
     current character position.