OSI/FTAM Programming Reference Manual

Glossary
HP NonStop OSI/FTAM Programming Reference Manual—528611-001
Glossary-28
swap volume.
swap volume. An optional disk volume used as an additional memory source during the
operation of any process under the NonStop operating system.
TACL. See HP Tandem Advanced Command Language (TACL).
tag parameter. An optional procedure-call parameter you can use in nowait applications on
NonStop systems to match nowait I/O requests with completions. If there are multiple
I/O requests outstanding in your application, the tag indicates which one has
completed.
TAL (Transaction Application Language). A high-level, block-structured language used to
write systems software and routines that support transaction-oriented applications on
NonStop systems. The TAL compiler translates source programs written in TAL into
executable object programs.
TAPS (Tandem application, presentation, and session) process. A process in the
OSI/AS subsystem that performs service and protocol functions for ACSE (in the
Application Layer), the Presentation Layer, and the Session Layer. The TAPS process
also performs some management services in the DSM environment. See also NSP
(network service provider) process. and TSP (transport service provider) process.
TAPS subdevice. A subdevice, maintained by OSI/AS, that enables communication
between an FTAM initiator or responder and the TAPS process. See subdevice.
TeletexString. The character-string type of strings conforming to CCITT Recommendation
T.61. These strings do not contain format effectors.
TLAM (Tandem LAN access method). A NonStop product that implements, for LANs, the
services of the Data Link Layer and layers below.
TPDU (transport protocol data unit). See PDU.
trace file. The file in which the SCF trace facility collects trace information while a trace is in
progress.
Transaction Application Language. See TAL (Transaction Application Language).
transfer syntax. In the Presentation Layer, the definition of the exact bit patterns to be used
to convey specified kinds of information in a communication. See also abstract syntax.
transient error. An ISO-defined type of diagnostic error that might not recur if the sequence
is repeated but does indicate the failure of the operation being performed. See also
error type., informative message., and permanent error.
transition state. See state transition.
transport address. See TSAP (transport service access point).