Implementing Metadata Standards for a Digital Audiovisual Preservation Repository

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This talk was created for discussion of PREMIS implementation in an audiovisual preservation repository environment.

Text of Implementing Metadata Standards for a Digital Audiovisual Preservation Repository

  • 1. Implementing metadatastandards for a digitalaudiovisual preservationrepositoryKara van MalssenAudioVisual Preservation Solutions2011-03-24

2. Case Study: NDIIPP PreservingDigital Public Television Project SIP site Repository WNET WGBHNYU PBSLibrary ofCongress 3. Producing Stations Satellite Station TransmittingAStations StationBWNETWGBH Station Station StationC A B Station StationC DPBSStation Station WNET E F Station StationG H Station StationI JWGBH NYU PDPTV Prototype RepositorySubmission Workow 4. NYU Goals: Create a prototype repository for long term retention Aggregate content from partner stations + PBS for sample programs Populate records with metadata that already exists (in station databases, les, scheduling systems, etc) Transform data and package content, while preserving relationships between items 5. Important VocabularyThe Repository: NYU prototype preservation repository OAIS : Open Archival Information SystemOAIS SIP: Submission Information Package Terms! AIP : Archival Information Package 6. SDHD SD Broadcast ProductionProduction BroadcastBroadcastMaster MasterMaster MasterMaster (mov/aiff/(mov)(mxf) (mov/data)(mpeg) m2v) DATABASE EXPORTSPODSTEAMS PROINMAGICTRACK ADDITIONAL ITEMS Scripts,etcChallenge of managingSIP Class 1: WNET NationalSIP Class 3: WNET Local BroadcastdiverseBroadcast (Nature)(New York Voices)SD ProductionHD SD BroadcastProductionSIPs: BroadcastBroadcastMasterMasterMaster(mxf) MasterMaster (mov/aiff/(mxf) (mov/data)(mpeg) m2v)PODS PROINMAGIC INMAGICTRACK SIP Class 2: WGBH NationalSIP Class 4: Religion and Ethics Broadcasts SDSDBroadcast ProductionBroadcast ProductionMaster Master Master Master(mov/aiff/(mov)(mov/aiff/(mov)m2v)m2v) TEAMS Scripts,PODSPODSPROetc TRACK 7. PDPTV metadata model METS: Metadata Encoding and Transmission Standard Structural and administrative PBCore: Public Broadcasting Metadata Dictionary Descriptive and technical PREMIS: Preservation Metadata Implementation Strategy Technical preservation metadata 8. METS: Metadata Encoding and TransmissionStandard Provides a structure to bundle all content (essence + metadata) in one AIP Identies types of metadata, but not the terms to dene them (with a few exceptions)METS leSecamdSecdmdSec structMap techMD rightsMD sourceMD digiprovMD behaviorSec 9. PBCore : What is it good for? Descriptive metadata elements that arespecic to public broadcasting & AV Controlled vocabularies with broadcast terms Easy to map to from legacy station databases Granular technical metadata (PBCore 1.2+) Accurately represents the le specic metadata Can be auto populated using technical metadataextraction tools & sytlesheets 10. PREMIS : Preservation Metadata Implementation Strategies IntellectualObject Entity:EntityCreating Rightsapplication infoPlaybackenvironmentObject Agents(hardware andsoftwareEvents 11. Given the wide range of institutional contexts,PREMIS cannot be an out-of-the box solution.Users have to decide how to model theirspecic application, which semantic unitsneed to be captured to support them, andhow to implement them.- ISQ Special Issue: Digitial Preservation, Spring 2010, p.9 12. NDIIPP:PDPTV repository naming schemeerType>erValue> er> createThe OMNEON server generated three les for the SD broadcast master:one QuickTime movie le (.mov), one video track (.m2v), and one audio track(.aiff). The .mov le contains fully-qualied pathname references to the .m2v and.aiff tracks that were only valid in the OMNEON server environment.Avid Unity Workgroup4Avid Media Composer REG_SZ3.0.5Omneon4.3 sr2 13. NDIIPP:PDPTV repository naming schemeerType> erValue>er>createThe OMNEON server generated three les for the SD broadcast master:one QuickTime movie le (.mov), one video track (.m2v), and one audio track(.aiff). The .mov le contains fully-qualied pathname references to the .m2v and.aiff tracks that were only valid in the OMNEON server environment.Avid Unity Workgroup4Avid Media Composer REG_SZ3.0.5Omneon4.3 sr2known to workrenderTo render the content in this environment the video track (.m2v) and audio track (.aiff) must be muxed using QTCoffee. The QuickTime movie le cannot be 14. known to workrenderTo render the content in this environment the video track (.m2v) and audio track (.aiff) must be muxed using QTCoffee. The QuickTime movie le cannot be used to render the content because the .mov le refers to the .m2v and .aiff tracks by fully-qualied le names that were only valid in the creating environment. Apple Macintosh OS X version 10.5.5operating systemApple QuickTime Player version 7.5.5rendererQTCoffee 1.2.5muxerIntel Core 2 Duoprocessor2 GB RAM 15. When combining different metadataspecications or when embedding extensionmetadata, we often nd that data modelsare mismatched or that semantic unitsoverlap. In these cases, it is necessary todecide how to overcome the conicts.- ISQ Special Issue: Digitial Preservation, Spring 2010, p.7 16. METS PBCoreTitleStructure CreatorDescriptionRelationships Agents File FormatRightsChecksumsFile SizeHardwareSoftwarePREMIS 17. METSPBCore TitleStructureCreator MODSDescriptionRelationships AgentsRights File FormatChecksums File SizeDescriptive elements only map to MODS Hardware SoftwareMETSRights! PREMIS 18. METS leSecamdSecdmdSec structMap techMD rightsMD sourceMD digiprovMD behaviorSec 19. METSamdSecdmdSec techMDrightsMDleSecstructMap 20. AIP creation simplied1. Content submitted, veried2. METS automatically generated (checksums into METS attributes)3. Source database exports automatically converted to PBCore4. Technical metadata extracted from les using MediaInfo, converted to PBCore5. MODS created from completed PBCore6. Rights metadata (METSRights), preservation metadata (PREMIS) created7. AIP complete 21. SDHDSD BroadcastProductionProductionESSENCE FILE Broadcast MasterMasterMasterMaster Broadcast (mov/aiff/ (mov)(mxf)Master TYPES (mov/data) m2v) (mpeg)METS METADATA METSPBCorePREMISRights MODSOriginalADDITIONAL ITEMS Scripts,database etc exportsAIP Class 1: Nationally distributed content (Nature) SDAIPs: HDBroadcastProductionBroadcastMETS MasterMasterMaster(mov/aiff/(mxf)(mov/data)m2v) OriginalMETS database PBCorePREMIS MODSRightsexportsAIP Class 4: Religion and Ethics SDBroadcast Production OriginalMETS Master Master database(mov/aiff/(mov) exportsm2v)METS Scripts, PBCorePREMIS MODSRights etc 22. Some le formats enable the capture oftechnical, and other, metadata within theirles, which has the advantage of keeping theles self-descriptive. However, by extractingand storing metadata explicitly we mayalso benet.- ISQ Special Issue: Digitial Preservation, Spring 2010, p.11