OSI/MHS P7 Application Programmatic Interface (P7 API) Manual

Glossary
OSI/MHS P7 Application Programmatic Interface (P7 API) Manual—424825-001
Glossary-21
programmatic command
programmatic command. In DSM, a command issued by a program rather than by a human
operator. See also interactive command.
programmatic interface. A mechanism by which a program can interact with other software.
programmed operator. In DSM, a management application that performs functions that
might otherwise be performed by a human operator.
protocol. The set of rules governing the format and meaning of the frames, packets, or
messages that are exchanged by the peer entities within a layer. See also service.
PSAP (presentation service access point). A logical location between the Presentation and
Application Layers, through which presentation services are made available to local
users and through which application services are made available to remote systems.
PSEL (presentation selector). An address at the boundary between the Presentation and
Application Layers, through which connections are established and maintained. A
single PSEL can service one or more connections simultaneously and can refer to one or
more presentation service access points (PSAPs).
P-selector. See PSEL.
PTrace. A program that enables you to display trace files. Trace criteria are specified with
SCF.
queue file. In the Transfer X400 gateway, a file in the queue manager that consists of three
logical queues: the ADMIN queue with entries for MR group registration, the
MESSAGE queue with entries for import work, and the EXPORT queue with entries for
export work.
queue manager. A queuing facility that lets Transfer requesters add an entry and retrieve an
entry from a queue for processing. The queue manager can be used independently of
Transfer; it is automatically installed when you configure the Transfer X400 gateway
and is also required for gateways using the Gateway Programmatic Interface (GPI).
reason code. A value indicating why a message could not be delivered (called a “non-
delivery-reason-code,” in the X.411 standard).
receipt notification. Communications that indicates to the sender of a message that the
message was received and read by the intended recipient.
$RECEIVE. The name of a special file through which a process receives and optionally
replies to messages from other processes.
recipient. A person or application that receives a message from a message handling system.
registration database. An OSI/MHS database that consists of three files: APPL, route, and
adjacent MTA.
reliable transfer service. See RTSE.