SNAX/APC Application Programming Manual

Glossary
SNAX/APC Application Programming Manual—138786
Glossary-14
TCP
TCP. See terminal control process (TCP).
terminal control process (TCP). A process responsible for terminal management and
transaction control, provided by Tandem as part of the Pathway/TS product. A TCP is a
multithreaded process that interprets the SCREEN COBOL requester programs in the
user’s application, executing the appropriate instructions for each I/O device or process
the TCP is configured to handle. The TCP coordinates communication between
SCREEN COBOL programs and their I/O devices or processes, and with the help of the
PATHMON process, establishes links between screen programs and server processes.
TP. See transaction program (TP)
.
TPI. See transaction program instance.
transaction. An exchange between (1) a workstation and a program, (2) two workstations, or
(3) two programs, that accomplishes a particular action or result; for example, the entry
of a customer’s deposit and the updating of the customer’s balance.
transaction program (TP). In SNA LU 6.2 architecture, an application program that
communicates via LU 6.2 facilities. More generally, a program that processes
transactions.
transaction program instance(TPI). In SNA LU 6.2 architecture, a transaction program is
an application program that communicates via LU 6.2 facilities. More generally, a
program that processes transactions. A TPI is an instance of a transaction program. A
TPI can be created by a transaction program issuing a Tandem TP-READY verb, and
deleted by a transaction program issuing a TP-READY verb, an ABORT/STOP
command, or a file system CLOSE request.
type 2.1 node. In SNA, a node that can participate in advanced peer-to-peer networking. It
contains its own control point which enables it to establish communication with other
type 2.1 nodes without the intervention of a system services control point.
unit of work (UOW). A message sent by one process to request another process to perform a
single operation. Several units of work may be concatenated in a single IPC message.
UOWs are implemented through verbs.
UOW. See unit of work (UOW)
.
user ID. APPC Security: the one to ten character value of the (MC-)AL-SECURITY-TYPE
field in the ALLOCATE or MC-ALLOCATE verb and in the ATTACH request. The
user ID is used to insure that a TP is authorized to start a conversation with another TP.
For more information, consult the SNAX/APC Application Programming Manual, Ver b
Definitions.
verb. In LU 6.2, a programming language element in the LU 6.2 application programming
interface that causes an LU 6.2 function to be performed. More generally, the general
name for a transaction program’s request for communication services. See also control
operator verb and conversational verb.