BS 7684-1993 工业电热设备的一般试验条件

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【英文标准名称】:Informationtechnology-OpenSystemsInterconnection-TheDirectory:Models
【原文标准名称】:信息技术.开放系统互连.目录:模型
【标准号】:ISO/IEC9594-2-2001
【标准状态】:作废
【国别】:国际
【发布日期】:2001-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;开放系统互连;开放系统互连;模型;信息交换;信息技术;人名地址录;网络互连;应用层
【英文主题词】:Applicationlayer;Definitions;Directories;Informationinterchange;Informationtechnology;Models;Networkinterconnection;Opensystemsinterconnection;OSI
【摘要】:ThemodelsdefinedinthisRecommendation|InternationalStandardprovideaconceptualandterminologicalframeworkfortheotherITU-TX.500-seriesRecommendations|partsofISO/IEC9594whichdefinevariousaspectsoftheDirectory.ThefunctionalandadministrativeauthoritymodelsdefinewaysinwhichtheDirectorycanbedistributed,bothfunctionallyandadministratively.GenericDSAandDSAinformationmodelsandanOperationalFrameworkarealsoprovidedtosupportDirectorydistribution.ThegenericDirectoryInformationModelsdescribethelogicalstructureoftheDIBfromtheperspectiveofDirectoryandAdministrativeUsers.Inthesemodels,thefactthattheDirectoryisdistributed,ratherthancentralized,isnotvisible.ThisRecommendation|InternationalStandardprovidesaspecializationofthegenericDirectoryInformationModelstosupportDirectorySchemaadministration.TheotherITU-TRecommendationsintheX.500series|partsofISO/IEC9594makeuseoftheconceptsdefinedinthisRecommendation|InternationalStandardtodefinespecializationsofthegenericinformationandDSAmodelstoprovidespecificinformation,DSAandoperationalmodelssupportingparticulardirectorycapabilities(e.g.Replication):a)theserviceprovidedbytheDirectoryisdescribed(inITU-TRec.X.511|ISO/IEC9594-3)intermsoftheconceptsoftheinformationframework:thisallowstheserviceprovidedtobesomewhatindependentofthephysicaldistributionoftheDIB;b)thedistributedoperationoftheDirectoryisspecified(inITU-TRec.X.518|ISO/IEC9594-4)soastoprovidethatservice,andthereforemaintainthatlogicalinformationstructure,giventhattheDIBisinfacthighlydistributed;c)replicationcapabilitiesofferedbythecomponentpartsoftheDirectorytoimproveoverallDirectoryperformancearespecified(inITU-TRec.X.525|ISO/IEC9594-9).Thesecuritymodelestablishesaframeworkforthespecificationofaccesscontrolmechanisms.ItprovidesamechanismforidentifyingtheaccesscontrolschemeineffectinaparticularportionoftheDIT,anditdefinesthreeflexible,specificaccesscontrolschemeswhicharesuitableforawidevarietyofapplicationsandstylesofuse.Thesecuritymodelalsoprovidesaframeworkforprotectingtheconfidentialityandintegrityofdirectoryoperationsusingmechanismssuchasencryptionanddigitalsignatures.ThismakesuseoftheframeworkforauthenticationdefinedinITU-TRec.X.509|ISO/IEC9594-8aswellasgenericupperlayerssecuritytoolsdefinedinITU-TRec.X.830|ISO/IEC11586-1.DSAmodelsestablishaframeworkforthespecificationoftheoperationofthecomponentsoftheDirectory.Specifically:a)theDirectoryfunctionalmodeldescribeshowtheDirectoryismanifestedasasetofoneormorecomponents,eachbeingaDSA;b)theDirectorydistributionmodeldescribestheprincipalsaccordingtowhichtheDIBentriesandentry-copiesmaybedistributedamongDSAs;c)theDSAinformationmodeldescribesthestructureoftheDirectoryuserandoperationalinformationheldinaDSA;d)theDSAoperationalframeworkdescribesthemeansbywhichthedefinitionofspecificformsofcooperationbetweenDSAstoachieveparticularobjectives(e.g.shadowing)isstructured.
【中国标准分类号】:L79
【国际标准分类号】:35_100_70
【页数】:226P.;A4
【正文语种】:英语


【英文标准名称】:Conicalspringwashersforscrewandwasherassemblies
【原文标准名称】:组合螺钉用锥形弹性垫圈
【标准号】:DIN6908-1990
【标准状态】:作废
【国别】:德国
【发布日期】:1990-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:螺钉垫圈组件;减震弹簧;材料;紧固件;螺钉锁紧装置;螺钉;名称与符号;尺寸;垫圈;极限尺寸;交货条件;弹簧垫圈
【英文主题词】:fasteners;screwlockingdevices;materials;dimensions;washers;springwashers;shockabsorbingsprings;limitdimensions;screw-and-washerassemblies;screws(bolts);designations;deliveryconditions
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:4050
【页数】:2P;A4
【正文语种】:德语