【英文标准名称】:Informationtechnology-Multimediacontentdescriptioninterface-Part2:Descriptiondefinitionlanguage
【原文标准名称】:信息技术.多媒体内容描述界面.第2部分:描述定义语言
【标准号】:ISO/IEC15938-2-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-04
【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】:信息技术;信息交换;数据表示;数据处理;界面;描述;定义;数据编码;程序设计语言;多媒体
【英文主题词】:Dataenciphering;Dataprocessing;Datarepresentation;Definitions;Descriptions;Informationinterchange;Informationtechnology;Interfaces;Multimedia;Programminglanguages
【摘要】:1ScopeofthisInternationalStandardThisInternationalStandardspecifiesametadatasystemfordescribingmultimediacontent.ItspecifiestheDescriptionDefinitionLanguage(DDL)thatcomprisespart2ofthestandard(ISO/IEC15938-2).ThegoalofthispartoftheMPEG-7InternationalStandardistospecifyalanguagethatwillenableMPEG-7usersanddevelopersto:·createvalidMPEG-7descriptionschemesanddescriptors;·developtoolssuchaseditorsandparsersforprocessingdescriptions,descriptionschemesanddescriptors;·generaterefinements,extensionsandmodificationstotheDDL.ThisInternationalStandarddescribesthefeaturesoftheDDL.ItdefinesthesyntaxoftheDDLconstructsanddatatypesandprovidesoptional(informative)examplesthatillustratetheapplicationoftheDDLtothespecificationandinstantiationofMPEG-7descriptions.2OverviewofDescriptionDefinitionLanguageThisInternationalStandard,knownasthe"MultimediaContentDescriptionInterface",aimsatprovidingstandardizedcoretechnologiesallowingthedescriptionofaudiovisualdatacontentinmultimediaenvironments.Thisisachallengingtaskgiventhebroadspectrumofrequirementsandtargetedmultimediaapplications,andthebroadnumberofaudiovisualfeaturesofimportanceinsuchacontext.Inordertoachievethisbroadgoal,thestandardspecifies:-Descriptors(D):representationsofFeatures,thatdefinethesyntaxandthesemanticsofeachfeaturerepresentation;-DescriptionSchemes(DS),thatspecifythestructureandsemanticsoftherelationshipsbetweentheircomponents,whichmaybebothDsandDSs;-ADescriptionDefinitionLanguage(DDL),toallowthecreationofnewDSsand,possibly,DsandtoallowtheextensionandmodificationofexistingDSs;-Systemtools,tosupportmultiplexingofdescription,synchronizationissues,transmissionmechanisms,fileformat,etc.TheDDLformsacorepartoftheMPEG-7standard.ItprovidesthesoliddescriptivefoundationthroughwhichuserscancreatetheirownDescriptionSchemesandDescriptors.TheDDLdefinesthesyntacticrulestoexpressandcombineDescriptionSchemesandDescriptors.AccordingtothedefinitionintheMPEG-7RequirementsDocument[1]theDDLis'...alanguagethatallowsthecreationofnewDescriptionSchemesand,possibly,Descriptors.ItalsoallowstheextensionandmodificationofexistingDescriptionSchemes.'TheDDLisnotamodellinglanguagesuchasUnifiedModellingLanguage(UML)butaschemalanguagetorepresenttheresultsofmodellingaudiovisualdata,i.e.,DSsandDs.TheDDLmustsatisfytheMPEG-7DDLrequirements.Ithastobeabletoexpressspatial,temporal,structural,andconceptualrelationshipsbetweentheelementsofaDS,andbetweenDSs.Itmustprovidearichmodelforlinksandreferencesbetweenoneormoredescriptionsandthedatathatitdescribes.Inaddition,itmustbeplatformandapplicationindependentandhuman-andmachine-readable.(Non-normative)DDLParserapplicationswillberequiredwhicharecapableofvalidatingdescriptionschemes(contentandstructure)anddescriptordatatypes[bothprimitive(integer,text,date,time)andcomposite(histograms,enumeratedtypes)],againsttheDDL.TheDDLParsersmustalsobecapableofvalidatingMPEG-7descriptionsorinstantiations,againsttheircorrespondingvalidatedMPEG-7schemas(DSsandDs).TheDDLdesignhasbeeninformedbynumerousproposalsandinputdocumentssubmittedtoMPEG-7sincetheMPEG-7CallforProposalsinOctober1998[2].IthasalsobeenheavilyinfluencedbyW3C'sXMLSchemaLanguage[3,4,5]andtheResourceDescriptionFramework(RDF)[6].Atthe51MPEGmeetinginNoordwijkerhoutinMarch2000,itwasdecidedtoadoptXMLSchemaLanguage[3,4,5]astheMPEG-7DDL.HoweverbecauseXMLSchemalanguagewasnotdesignedspecificallyforaudiovisualcontent,certainextensionshav
【中国标准分类号】:L81
【国际标准分类号】:35_040
【页数】:37P;A4
【正文语种】:英语
基本信息
| 标准名称： | 粗梳羊绒织品 |
| 英文名称： | Woollen cashmere fabrics |
| 中标分类： |
纺织 >>
毛纺织 >>
毛坯布及制品 |
| ICS分类： |
纺织和皮革技术 >>
纺织产品 >>
纺织物
|
| 替代情况： | 被FZ/T 24007-2010代替 |
| 发布日期： | 1998-03-24 |
| 实施日期： | 1998-10-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2010-12-01 |
| 归口单位： | 全国纺织标准化技术委员会毛纺分技术委员会 |
| 起草单位： | 全国纺织标准化技术委员会毛纺分技术委员会 |
| 出版日期： | 1900-01-01 |
| 页数： | 13页 |
适用范围
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前言
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所属分类： 纺织 毛纺织 毛坯布及制品 纺织和皮革技术 纺织产品 纺织物