ISO/IEC 10744-1997 信息技术超媒体/时基结构化语言(HyTime)

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【英文标准名称】:Informationtechnology-Hypermedia/Time-basedstructuringlanguage(HyTime)
【原文标准名称】:信息技术超媒体/时基结构化语言(HyTime)
【标准号】:ISO/IEC10744-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-08
【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】:传播技术;定义;超媒体;超时间;程序设计语言;信息技术
【英文主题词】:Communicationtechnology;Definitions;Hypermedia;HyTime;Informationtechnology;Programminglanguages
【摘要】:1DefinitionofscopeThisInternationalStandarddefinesalanguageandunderlyingmodelfortherepresentationof"hyperdocuments"thatlinkandsynchronizestaticanddynamic(time-based)informationcontainedinmultipleconventionalandmultimediadocumentsandinformationobjects.Thelanguageisknownasthe"Hypermedia/Time-basedStructuringLanguage",or"HyTime".HyTimecanrepresenttimeinboththeabstract,or"musical"sense,andinuser-definedreal-timeunits.Italsoprovidesawayofrelatingthetwosothatelementsoftime-dependentdocumentscanbesynchronized.NOTE7Thisfacilityextendstotherepresentationofmultimediainformationthepower,oncelimitedtoconventionaldocuments,todistinguishintrinsicinformationcontentfromstyleconsiderations.HyTime'stechniquesforrepresentingitstimemodelareequallyapplicabletospatialandotherdomains;allaretreatedassystemsformeasuringalongdifferentaxesofacoordinatespace.Arbitrarycross-referencesandaccesspathsbasedonexternalinteractions("hypermedialinks")arealsosupported.HyTime'stimerepresentationcontainssufficientinformationtoderivethedurationsofbothcontrol("gestural")data(e.g.,controlinformationforaudioorvideohardware)andvisualdata(e.g.,amusicscore,presentationstoryboard,ortelevisionscript).ThemediaformatsanddatanotationsofobjectsinaHyTimehyperdocumentcanincludeformattedandunformatteddocuments,audioandvideosegments,stillimages,andobject-orientedgraphics,amongothers.Userscanspecifythepositionsandsizesofoccurrencesofobjectsinspaceandtime,usingavarietyofmeasurementunitsandgranularities.Temporalrequirementsofapplicationsrangingfromanimationtoprojectmanagementcanbesupportedbychoosingappropriatemeasurementgranules.NOTE8ThisInternationalStandarddoesnotaddresstherepresentationofaudioorvideocontentdata,butsimplydefinesthemeansbywhichthestart-timeanddurationofsuchdatacanbesynchronizedwithotherdigitizedinformation.Nordoesitspecifythelayoutprocessbywhichoccurrencesofunformatteddocumentsandotherinformationobjectscanbemadetofitthepositionsandsizesspecifiedforthem.HyTimeisanenablingstandard,notanencompassingone.Asaresult,theobjectscomprisingaHyTimehyperdocumentarefreetoconformtoanyapplicationarchitectures,ortodocumentarchitecturesimposedbystandards,andtoberepresentedinanynotationpermittedbythosearchitectures.Onlythe"hubdocumenf,whichmaydeterminethehyperdocumentmembership,mustconformtoHyTimeinadditiontoanyotherarchitecturestowhichitmayconform.HyTimeisdesignedforflexibilityandextensibility.Optionalsubsetscanbeimplemented,aloneorinconjunctionwithuser-definedextensions.TheHypermedia/Time-basedStructuringLanguage(HyTime)isanSGMLapplicationconformingtoInternationalStandardISO8879—StandardGeneralizedMarkupLanguage.ThehyperdocumentinterchangeformatrecommendedinthisInternationalStandardisISO9069,theSGMLDocumentInterchangeFormat(SDIF).SDIFisdefinedinAbstractSyntaxNotation1(ISO/IEC8824)andcanbeencodedaccordingtothebasicencodingrulesofISO/IEC8825forinterchangeusingprotocolsconformingtotheOpenSystemsInterconnection(OSI)model.Otherinterchangeformatscanalsobeused.2FieldofapplicationThefieldofapplicationofHyTimeis"integratedopenhypermedia"(IOH),the"bibliographicmodel"ofhyperlinkingwhereinanauthorcan,byasuitablereference,linktoanything,anywhere,atanytime.BecauseofHyTime'smodulardesignandflexibleconformancerules,implementationsneedsupportonlythosefacilitiesthatarewithintheirpresentcapabilities.Userinvestmentinhyperdocumentpreparationisneverthelessencouragedbecauseofthewell-definedupward-compatiblepathtoafullhypermediasolution.H
【中国标准分类号】:L74
【国际标准分类号】:35_060;35_240_99
【页数】:468P.;A4
【正文语种】:英语