VMS Help INITIALIZE, Qualifiers, /INTERCHANGE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the magnetic tape will be used for interchange in
    a heterogeneous vendor environment. The /INTERCHANGE qualifier
    omits the ANSI VOL2 labels. Under OpenVMS, the ANSI VOL2 labels
    contain OpenVMS specific security attributes.

    For more information on the /INTERCHANGE qualifier and on
    magnetic tape labeling and tape interchange, refer to the OpenVMS
    System Manager's Manual, Volume 1: Essentials.