Preservation Functionality in a Digital ArchiveOutlineIntroductione-Depote-Depot (2)e-Depot (3)Preservation SubsystemPreservation Subsystem (2)Preservation ManagerPreservation Manager (2)Preservation Layer ModelPreservation Layer Model (2)View PathFile Type SpecificationThe User InterfaceThe User Interface (2)The User Interface (3)The User Interface (4)KB - State of the ArtFinally...PowerPoint PresentationSlide 22ReferencesPreservation Functionality in a Digital Archive Erik OltmansKoninklijke BibliotheekRaymond J. van DiessenIBM Business Consulting ServicesHilde van WijngaardenKoninklijke Bibliotheekvpresented by: Martin Klein04/14/2005Outline e-Depot Preservation Subsystem Preservation Manager Preservation Layer Model View Paths / File Type Specification In Reality – The User Interface State of the Art / ConclusionIntroduction National Library of the Netherlands – Koninklijke Bibliotheek (KB) digital archiving system – e-Depot collaboration with IBM (NL) agreements with scientific publishers Preservation Manager addede-Depot KB specified system requirements for OAIS based deposit system IBM delivered Digital Information Archiving System (DIAS) KB maintains service called e-Depot using DIAS workflow for archiving electronic publicationsvalidating & pre-processing of digital contentgernerating & resolving id'ssearching & retrieving publicationsuser identification, authentification & authorizatione-Depot (2) offline media (CD-ROM) “installables” CD-ROM installed on reference workstations (RWS) image generated including sofware & OS manual cataloguing and storing in e-Depot online media (electronic articles) send on tapes to KB or download via FTPe-Depot (3)IAAEnd UserMetadata(Identifier)D I A SCatalogueStoragePublisherPost officeMetadataContentSIPErrorRecoveryPreservation Subsystem Preservation Manager technical metadata of file format needed to render information Preservation Processor process of automatic migration of inaccessible formats Permanent Access Toolbox (PATbox) tools to ensure long-term access to electronic publications approach of Universal Virtual Computer (UVC)Preservation Subsystem (2)Permanent Access ToolboxPreservationProcessorPreservationManagerPreservation SubsystemSIPDIPPackaging&DeliveryAccessDataManagementAIPIngestAIPAdministration Monitoring & LoggingArchival StorageDelivery&CaptureDataDataPreservation Manager stores technical metadata for every file format in the e-Depot separate technical metadata from publications objectives: identify e-publications in danger of becoming inaccessible planning preservation activities (migration, emulation) specifying software & hardware environment to render content technical metadata structured according to Preservation Layer Model (PLM) and registered in View Paths PLM defines template for description of rendering environment View Path contains actual instance of a rendering path for a specific file formatPreservation Manager (2) 6 steps to define metadata in this framework: define:(1) attributes(2) layers(3) Preservation Layer Model(4) View Path(5) File Type Identification(6) Associate File Type Identification with View PathPreservation Layer Model builds on the “von Neumann” computer architecture series of layers, build on functionality provided by previous layer to render any electronic publication layers can be identifiedReference PlatformOperating SystemViewer ApplicationData FormatWindows PDF viewerPDF version 1.2Pentium 2Pentium 3Win 98Win 95Win XPPreservation Layer Model (2)data formatviewer applicationoperating systemplatformView Path format specific technical metadata is called View Path all file formats in e-Depot need at least on View Path multiple View Path for one file type possible categories to define the quality of different View Paths based on authenticity criteria high – matches perfectly medium – matches most low – matchesFile Type Specification used to identify the different file formats (stored in e-Depot) link between files and View Path – stored in Table of Contents (TOC) publication has XML based TOC to specify name and file type unique File Type ID generated to associate file format with metadata defines in View Path => the only reference between metadata and electronic publicationThe User InterfaceThe User Interface (2)The User Interface (3)The User Interface (4)KB - State of the Art initially no preservation system in e-Depot included standalone version of Preservation Manager implemented – still testing ~47 file formats recognized over 2.500 journals and 6 mio articles implemented export mechanism for interoperabilityFinally... KB implemented concept of deposit system based on OAIS store publications and deal with metadata refering to layer model maintaining PLM and View Paths to avoid inaccessibility KB made some stepsReferences Preservation Functionality in a Digital Archive; Oltmans, E., van Diessen, J. Raymond, van Wijngaarden, Hilde, 2004 Digital Preservation at the Koninklijke Bibliotheek, van Wijngaarden, Hilde The e-Depot: Current Status & Developments, Oltmans, E. From Manifestation to Content - The selection policy of the National Library of the Netherlands, Amse, Anne
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