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PREMIS in the Real World: some reflections on constraints

PREMIS in the Real World: some reflections on constraints . Jan Lavelle Senior Librarian (Systems Development) State Library of Tasmania. SLT Preservation systems. SLT preservation is a production environment with a small staff Can only give intermittent time to development

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PREMIS in the Real World: some reflections on constraints

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  1. PREMIS in the Real World: some reflections on constraints Jan LavelleSenior Librarian (Systems Development) State Library of Tasmania

  2. SLT Preservation systems • SLT preservation is a production environment with a small staff • Can only give intermittent time to development • 2 established preservation programs • Our Digital Island (ODI) - Tasmanian websites (1998-) • STORS – document repository (2003-) • 1 developing preservation project • Format migration – AV digitisation (2005-) • 1 emerging preservation project • Implementation of Digital Object Management system (2006-)

  3. Format migration project • PREMIS investigated for this project • Started July 2005 • Audio cassettes, video cassettes etc digitised for preservation • Digitisation staff are NOT expected to create complex preservation metadata manually • Currently metadata kept in various places as a temporary measure until new Digital Object Management system implemented. Will use METS to pull it together. • Descriptive – TALIS catalogue • Technical – within digital file metatags • Preservation • PREMIS common fields – spreadsheet kept with digital files • PREMIS individual file fields – within digital file metatags • Structural • Directory structure mirrors physical structure

  4. PREMIS and Format migration • PREMIS data dictionary document physically difficult to navigate and use • To a first-time user, PREMIS was sometimes confusing • Technical MD, structural MD overlap with other schemas • Digital creation details - where do these go? • Important to preserve the relationship between the digital file and its analogue original ie provenance • Only creatingApplication provided in PREMIS object fields • PREMIS Event? • Creation/digitisation not listed in examples of event types

  5. PREMIS and Format migration • PREMIS metadata will be created in bulk: • Files of the same type created in the same way will have the same PREMIS metadata eg WAV files created from audio cassettes • eg objectCategory, preservationLevel, formatName etc • Stored in a spreadsheet with the WAV files • PREMIS fields for individual files will be automatically extracted using JHOVE or similar tool • eg size, originalName etc • Non-PREMIS technical MD also extracted

  6. PREMIS and Format migration • Some PREMIS fields not yet used, but will be when Digital Object Management system implemented eg fixity, event • Some PREMIS fields not likely to be used eg signature, environment • Environment not suitable for common global formats - PDF, jpg etc - possibly misleading, inaccurate, incomplete • Better to have information in central registry like PRONOM or GDFR

  7. PREMIS and STORS, ODI • STORS and Our Digital Island • Use PREMIS as checklist to add more preservation metadata fields • Retrofit preservation metadata • Our Digital Island preserved websites • Representation level for websites • Upgrade could be done in bulk for some PREMIS fields • Number low enough to allow some manual upgrade of metadata records • File level • Large number of individual files - more than 2.5 million • Could only use automatic extraction, but storing and working with that amount of metadata is an issue • Is it workable or worthwhile to record preservation metadata at the file level for websites?

  8. Other preservation projects • Digital Object Management system • Investigate preservation metadata functionality during implementation • Maturing view of preservation metadata • Building on past experience • DOM will have most complete preservation metadata to date in SLT

  9. SLT preservation metadata profile • Very early draft status currently • Will be amended as new Digital Object Management system is implemented and as ODI and STORS metadata are investigated further • SLT will conform with recommended standards for preservation metadata • SLT will be an implementer rather than a developer • Can’t afford continuous monitoring of development of standards

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