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

       /FORMAT=keyword

    Specifies the output format of the product kit. Keywords are:

    REFERENCE      Reference format in which product files are placed
                   in a directory tree.

    SEQUENTIAL     Sequential format in which product files are
                   placed in <full-product-name>.PCSI, a container
                   file.

    The default is /FORMAT=REFERENCE.