Covers access to files between the filestores of two end systems, using the OSI connection-mode transport service to provide the interconnection. Specifies implementations that support file transfer and file access, i.e. the ability to (a) read an FADU which is identified by node name, node number or by position (depending on constraint set and document type), (b) write (replace and/or extend and/or insert, depending on constraint set and document type) to a file, and (c) locate and erase within a file; and optionally to (a) create and delete a file, and (b) read the attributes of a file. Specifies how the OSI FTAM application standard shall be used to provide the functions defined above. The requirements placed on an implementation in this part of ISO/IEC ISP 10607 are solely those necessary for operation of the protocol specified. Describes the actions and attributes of the virtual filestore, and the service provided by the file service provider to file service users, together with the necessary communications between the initiator and the responder. Applicable on the double lines of figure 1. The mapping between the virtual filestore and the real filestore together with the local data management system is not defined in this part of ISO/IEC ISP 10607. Defines the selection of specific virtual filestore options, file service options and file protocol options.