ISO 16484-5:2003(E)
14
© ISO 2003 – All rights reserved
3. DEFINITIONS
2
ASHRAE 135-2001
3.1.10 real open system: a real system which complies with the requirements of OSI standards in its communication with other
real systems (ISO 7498).
3.1.11 real system: a set of one or more computers, the associated software, peripherals, terminals, human operators, physical
processes, information transfer means, etc., that forms an autonomous whole capable of performing information processing
and/or information transfer (ISO 7498).
3.1.12 (N)-service-access-point: the point at which (N)-services are provided by an (N)-entity to an (N+1)-entity (ISO 7498).
3.1.13 (N)-service-data-unit: an amount of (N)-interface-data whose identity is preserved from one end of an (N)-connection
to the other (ISO 7498).
3.1.14 service-user: an entity in a single open system that makes use of a service through service-access-points (ISO TR 8509).
3.1.15 service-provider: an abstract of the totality of those entities which provide a service to peer service-users (ISO TR
8509).
3.1.16 transfer-syntax: that concrete syntax used in the transfer of data between open systems (ISO 7498).
3.1.17 service-primitive; primitive: an abstract, implementation-independent representation of an interaction between the
service-user and the service-provider (ISO TR 8509).
3.1.18 request (primitive): a representation of an interaction in which a service-user invokes some procedure (ISO TR 8509).
3.1.19 indication (primitive): a representation of an interaction in which a service-provider either
(a) indicates that it has, on its own initiative, invoked some procedure; or
(b) indicates that a procedure has been invoked by the service-user at the peer service-access-point (ISO TR 8509).
3.1.20 response (primitive): a representation of an interaction in which a service-user indicates that it has completed some
procedure previously invoked by an interaction represented by an indication primitive (ISO TR 8509).
3.1.21 confirm (primitive): a representation of an interaction in which a service-provider indicates, at a particular service-
access-point, completion of some procedure previously invoked, at that service-access-point, by an interaction represented by a
request primitive (ISO TR 8509).
3.1.22 user element: the representation of that part of an application-process which uses those application-service-elements
needed to accomplish the communications objectives of that application-process (ISO 7498).
3.2 Terms Defined for this Standard
3.2.1 access control: a method for regulating or restricting access to network resources.
3.2.2 alarm: 1. An annunciation, either audible or visual or both, that alerts an operator to an off-normal condition that may
require corrective action. 2. An abnormal condition detected by a device or controller that implements a rule or logic specifically
designed to look for that condition.
3.2.3 algorithmic change reporting: the detection and reporting of an alarm or event, based on an algorithm specified in an
Event Enrollment object. See intrinsic reporting in 3.2.27.
3.2.4 BACnet device: any device, real or virtual, that supports digital communication using the BACnet protocol.
3.2.5 BACnet-user: that portion of an application-process that is represented by the BACnet user element.
3.2.6 bridge: a device that connects two or more segments at the physical and data link layers. This device may also perform
message filtering based upon MAC layer addresses.
FINAL DRAFT / PROJET FINAL
我的内容管理
展开
