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【英文标准名称】:Informationtechnology.InternationalstandardizedprofilesFVT3nn.Virtualterminalbasicclass.Registerofattributeassignmenttypedefinitions.FVT321.Fontassignment.TypeNo.1
【原文标准名称】:信息技术.国际标准化数据区FVT3nn.虚拟终端基础级.属性分配型定义注册.FVT321.字体分配.1型
【标准号】:BSISO/IECISP11186-1-1997
【标准状态】:作废
【国别】:英国
【发布日期】:1997-03-15
【实施或试行日期】:1997-03-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:字符表示;应用层(开放系统互连);字符集;代码字符集;代码表示;计算机终端;句法;数据处理;信息交流;开放系统互连
【英文主题词】:codedcharactersets;codedrepresentation;representationofcharacters;syntax;charactersets;applicationlayer(osi);opensystemsinterconnection;computerterminals;informationexchange;dataprocessing
【摘要】:1.IGeneralTheconceptofProfilesforOSI,andthestructureoftheInternationalStandardizedProfilesthatdocumentthem,aredefinedinISO/IECTR10000-l.SuchProfilesaredividedintoanumberofdifferentclassesandsub-classes.Twooftheseclassescontainsub-classescomprisingfunctionsoftheVirtualTerminalBasicClassServiceandProtocolspecifiedinthebasestandardsIS09040andIS09041.ThesearetheApplicationProfiles(A-Profiles)andtheInterchangeFormatandRepresentationProfiles(F-Profiles).TherelationshipbetweenA-ProfilesandF-Profilesisdescribedin7.3.2ofISO/IECTR10000-landisasfollows.ApplicationLayerbasestandardsrequire,implicitlyorexplicitly,thestructureofinformationcarriedorreferencedbythemtobespecifiedforeachinstanceofcommunication.ItisthepurposeofF-Profilestospecifysuchinformationstructures.ParticularfunctionalrequirementsmaythenbemetbythecombinationofanA-ProfilewithoneormoreFProfiles.EstablishmentofaVT-associationinvolvestheselectionbynegotiationofaparticularVirtualTerminalEnvironmentprofile(VTE-profile),andofparticularvaluesforanyargumentsofthatVTE-profile.TheVTE-profilespecification,andpossiblyalsothevaluesofcertainVTE-profilearguments,mayinturnreferencethedefinitionsofVTcontrolobjecttypesandattributeassignmenttypes.TheseVTE-profiles,controlobjecttypesandattributeassignmenttypesarethereforeinformationObjectsthatrequireexplicitreferencewithintheVTprotocol.ParticularinstancesoftheseInformationObjectsarefullydefinedwithinthebasestandards,butthebasestandardsalsoprovideforfurtherinstancestobedefinedbyregistration.EachregisteredinstanceconstitutesanF-ProfilewithintheframeworkofISO/IECTR10000.TheVirtualTerminalBasicClassServiceandProtocolmaybeusedtorealiseawiderangeofdistinctfunctions.ParticularfunctionsmayberealisedthroughtheselectionofappropriateVTfunctionalunits,F-ProfilesandotherVTEprofileargumentvalues.ThespecificationoftheselectionrequiredtorealiseaparticularfunctionandtopromoteinteroperabilityconstitutesaVirtualTerminalA-ProfilewithintheframeworkofISO/IECTR10000.1.2PositionwithinthetaxonomyThetaxonomyofInternationalStandardizedProfilesforOSIislaiddowninISO/IECTR10000-2.Withintheclassificationschemeofthistaxonomy,theOSIProfilesspecifiedinthisInternationalStandardizedProfileareintheVirtualTerminalRegisteredObjectsub-classoftheclassofInterchangeFormatandRepresentationProfiles.AProfilewithinthissubclasshasaProfileidentifieroftheformFVTabc,whereabcisastructurednumericalidentifierthatidentifiesthepositionoftheProfilewithineachofthethreelevelsofsubdivisionofthesubclass.Thevaluesofaandbaresingledigitsbutcisanintegerthatisnotnecessarilyasingledigit.1.3ScenarioThespecificationoftheVirtualTerminalServiceisgiveninIS09040.ItisbasedonamodelinwhichtwoVT-userscommunicatebymeansofasharedConceptualCommunicationArea(CCA)thatisaconceptualpartoftheVTservice-provider.InformationexchangeismodelledbyoneVT-userupdatingthecontentoftheCCAandthechangedstateoftheCCAthenbeingmadeaccessibletothepeerVT-user.
【中国标准分类号】:L70
【国际标准分类号】:35_100_05
【页数】:18P.;A4
【正文语种】:英语