VMS Help MERGE, Output File Qualifiers, /INDEXED_SEQUENTIAL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Defines the output file organization as indexed sequential. The
    output file must exist and must be empty. Used with the /OVERLAY
    qualifier.

    Format

      output-file-spec/INDEXED_SEQUENTIAL

  Additional Information (explode) :

• Full Description
• Example