Product Code:SAE AS1039
Title:Fitting, Tee, Standard and Reducer, Bulkhead on Side, Flared
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:No scope available.【英文标准名称】:Informationtechnology-Opensystemsinterconnection-Virtualterminalbasicclassservice
【原文标准名称】:信息技术.开放式系统互连.虚拟终端基本等级服务
【标准号】:BSISO/IEC9040-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-10-15
【实施或试行日期】:1997-10-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:数据传输;开放系统互连;数据处理;计算机制图;信息交流;数据传输控制规程;通信规程;计算机技术;应用层(开放系统互连);数据传送
【英文主题词】:Communicationprocedures;Dataprocessing;Definitions;Informationexchange;Informationinterchange;Informationtechnology;Networkinterconnection;Opensystemsinterconnection;OSI
【摘要】:ThisInternationalStandarddefines,inanabstractway,theexternallyvisibleBasicClassVirtualTerminalServicewithintheOSIApplicationLayerintermsofa)amodeldefiningtheinteractionbetweenusersoftheservice;b)theprimitiveactionsandeventsoftheservice;c)theparameterdataassociatedwitheachprimitiveactionandevent;d)therelationshipbetween,andthevalidsequencesof,theseactionsandevents.TheservicedefinedinthisInternationalStandardisthatwhichisprovidedbytheOSIBasicClassVirtualTerminalProtocol(inconjunctionwiththeAssociationControlServiceElementandthePresentationService)andwhichmaybeusedbyanyuserincludingotherApplicationServiceElements.Therela-tionshipbetweenthestandardsforVirtualTerminalService,VirtualTerminalProtocol,ACSE,PresentationLayerServiceandtheuseroftheVirtualTerminalServiceisshowninfigure1.ThisInternationalStandardalsodefinestwostandarddefaultvirtualterminalenvironmentprofilesanddescribestheformofregisteredvirtualterminalenvironmentprofilesandcontrolobjects.Virtualterminalenvironmentprofilesdefinesetsofvirtualterminalenvironmentparametersforuseintheestab-lishmentofvirtualterminalassociationsandsubsequentne-gotiation.ThisInternationalStandardalsodefinesastructureofASN.1ObjectIdentifiersfortheobjectsdefinedinthisInternationalStandardandforuseinaregisterofvirtualterminalobjects.ThisInternationalStandarddoesnotspecifyindividualimple-mentationsorproducts,nordoesitconstraintheimplementa-tionofentitiesandinterfaceswithinacomputersystem.Thereis,therefore,norequirementforconformancetothisInterna-tionalStandard.ThisInternationalStandardappliestointeractiveapplicationsrequiringterminalorientedcommunicationexpressedintermsofthetransmissionandmanipulationofgraphicalimageshavingthefollowingcharacteristics:e)theimagesarecomposedofcharacter-boxgraphicele-mentsorganisedintoaone,twoorthreedimensionalstructure;f)attributesmaybeassociatedwithanygraphicelementtoqualifyitsmodeofdisplay.Controlinformationforthecommunicationcanbemodelledusingvirtualterminalcontrolobjects,andmultipledevicescanbemodelledusingvirtualterminaldeviceobjectslinkedtotheothervirtualterminalobjects.
【中国标准分类号】:L79
【国际标准分类号】:35_100_70
【页数】:98P.;A4
【正文语种】:英语