This section describes the way in which the FTAM implements the virtual filestore, and the mechanisms used for mapping virtual and real filestores in a BS2000 system.
Some FTAM attributes are mapped to the attributes available in BS2000, and others to the so-called “FTAM catalog”. Attributes that have no significance in BS2000 are ignored.
The FTAM catalog is used to extend the file attributes available in BS2000. It is only relevant for access using FTAM. This means that a file can be deleted using a BS2000 command (e.g. DELETE-FILE) , even if the permitted actions parameter from the FTAM catalog does not permit this for an FTAM partner.
Entries in the FTAM catalog are created using inbound file management requests or a file transfer request, or by modifying the local FTAM attributes. When the file is deleted from the remote system, the appropriate entry in the FTAM catalog is also removed.
It is important to remember that a file identified as a text file in the FTAM catalog, for example, cannot be transferred as a binary file, nor can it be extended by binary data.