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National Archives of Australia Digital Preservation Michael Carden 3 What does the National Archives keep? Paper files. Photographs. Architectural drawings. Sound recordings. Film and video. Textiles. 4 A wide variety of records 5 A wide variety of records 6 A wide variety of records 7 Digital Records 8 Why digital preservation? Hardware / media obsolescence. Operating system obsolescence. Software application obsolescence. 9 Hardware 10 Media 11 Software 12 Digital Preservation Started R&D in 2001. The Essential Performance Model. Designed and built a digital archive. Now in production use for two years. 13 Computer Museum 14 Emulation 15 National Archives method Normalise to selected open formats. Store original and normalised versions with metadata. 16 Preservation using Xena <metadata> Original <metadata> Data <metadata> Open Format <metadata> 17 Open formats Based on open standards. Community developed. Multiple implementations. No licensing constraints. 18 Open format examples ODF - OpenDocument Format. XML – eXtensible Markup Language. HTML – Hypertext Markup Language. PNG – Portable Network Graphics. FLAC – Free Lossless Audio Codec. 19 Xena software Determines file formats. Converts to open formats. Custom metadata wrappers. Desktop or ‘backend’ app. 20 Open source software Transparency. Authenticity. Collaboration. Lower the bar for entry. 21 Xena integration DSpace at Sydney University. TRIM at the City of Perth. Alfresco Content Manager. Digital Preservation Recorder. 22 Digital Preservation Recorder Preserves an audit trail. Guides workflow. Controls external software. Manages the Digital Archive. 23 Three-step process Digital Preservation Recorder Software Antivirus Xena Checker ! Hardware Data Quarantine Preservation Digital Archive 24 Free downloads http://xena.sourceforge.net http://dpr.sourceforge.net 25 The Future Digital video. Databases. 2D and 3D modelling. Geospatial data. And so on... 26 Epilogue “Digital information lasts forever...” 27 Epilogue “Digital information lasts forever... or five years, whichever comes first.” -- Jeff Rothenberg. Scientific American, January 1995. 28.

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