gument's sake, let's say the transport driver indicated that its preferred format is that of a HugeArray with variable-sized elements. The application will ask the Mailbox library for a VM file to use, then convert the page into such an array, presumably placing each field of the address page into its own array element. Any references between the pieces are stored as indices into the array. For example, if the page is made up of the individual entries within the address card, plus a header that contains the