OSI/FTAM Programming Reference Manual

Glossary
HP NonStop OSI/FTAM Programming Reference Manual—528611-001
Glossary-25
service user.
service user. An entity that uses services provided to it by a lower-layer entity. For
example, the FTAM initiator is a service user of ACSE and presentation services
provided by OSI/AS. Contrast service provider.
session address. See SSAP (session service access point).
Session Layer. Layer 5 in the OSI Reference Model. This layer allows the setup and
termination of communication sessions between systems on the network.
session selector. See SSEL (session selector).
session service access point. See SSAP (session service access point).
simplification. The process of deriving one document from another document of a different
type by discarding structural information. In particular, the act of reading a file of a
specific FTAM document type as a less structured, or simpler, FTAM document type.
SPDU (session protocol data unit). See PDU.
SPI (Subsystem Programmatic Interface). A set of procedures and associated definition
files used on NonStop systems to define common message-based interfaces for
communication between requesters and servers—for example, in a management
application. The SPI interface to NonStop FTAM is not available for customer use.
SQL (structured query language). A fourth-generation-language standard that provides a
means to access and associate data in a relational database.
SSAP (session service access point). A network-unique address in the Session Layer
through which connections are established and maintained; also called session
address.
SSEL (session selector). A logical address in the Session Layer through which session
services are made available.
state. (1) The condition at a particular point in the OSI protocol. See also protocol state
machine. (2) In DSM, the current condition of an object that indicates its readiness to
do work. States for PROCESS objects include STARTED, STOPPED, SUSPENDED,
and UNKNOWN. The only state for SU objects is STARTED; the only state for
SUBSYS objects is DEFINED. See also state transition.; also called summary state.
state machine. See protocol state machine.
state-result parameter. A parameter, returned in indications and confirms for primitives that
establish a regime, that indicates whether or not the remote responder has established
the requested regime. The valid values are success (ZFTM-VAL-STATESUCCESS in
the FTAM API) and failure (ZFTM-VAL-STATE-FAILURE in the FTAM API). Note that
this parameter is not returned for primitives that cannot fail, such as F-DELETE,
F-CLOSE, and F-DESELECT. For such primitives, only action-result is returned. See
action-result parameter.