FTAM/9000 Programmer's Guide

452 Glossary
Glossary
Low Level Service (LLS) A
function that provides the lowest
level of service for the MAP 3.0
application interface; a LLS does
not contain a sequence of other
calls.
Manufacturing Automation
Protocol (MAP) A seven layer
communications specification;
allows multivendor communication
among factory automation
equipment without custom links.
Network Service Access Point
(NSAP) An addressable point in
the Network layer that provides
services to the Transport layer;
identified by a unique value that
allows network layers to identify
the connection to its peer.
Node The elementary component
from which a FADU tree is built.
Node Name A name used to
locate a node that is part of the
structuring information contained
in a FADU.
Note (an event) To indicate that
a request was serviced and its
outcome is available. For example,
issuing an em_wait call is asking
for the event that was noted for the
longest period of time.
Open Systems Interconnection
(OSI) A set of standards that
define the seven layers of
communication protocols for a
network; ISO defines these
standards.
Packet A unit of transmitted data,
with a fixed maximum size.
Presentation Address An
address used to communicate with
other systems and processes; is
unique within the network.
Presentation Service Data Unit
(PSDU) The actual Presentation
layer data transmitted to the peer
Presentation layer.
Protocol A formalized set of rules
for network communication.
Real File The actual file,
including its name and attributes,
that is mapped to the VFS.
Real Filestore A collection of
actual files, including their names
and attributes, that is mapped to
the VFS.
Regime The period during which
you can call a specific set of FTAM
functions; the regime determines
the activities that can occur at a
given time and therefore, creates