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BitstreamFormat Renovation:

DSpace Gets Real Technical Metadata. BitstreamFormat Renovation:. BitstreamFormat Renovation Prototype. Benefits (Why Should I Care?) ‏. The new format identifier corrected or fixed unidentified data formats of 858 Bitstreams in DSpace@MIT. How many are mis-identified in your repository?

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BitstreamFormat Renovation:

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  1. DSpace Gets Real Technical Metadata BitstreamFormat Renovation:

  2. BitstreamFormat Renovation Prototype Benefits (Why Should I Care?)‏ • The new format identifier corrected or fixed unidentified data formats of 858 Bitstreams in DSpace@MIT. How many are mis-identified in your repository? • Accurate MIME-types improve delivery to Web clients • Quality preservation requires accurate data format knowledge • Interoperability with internal and external tools relies on correct technical metadata in commonly-recognized standards • Without automated tools, maintenance of format technical metadata is a tedious manual job for repository managers

  3. BitstreamFormat Renovation Prototype Data Formats A “Data Format” is defined as: Technical Metadata that describes how abstract information is encoded and structured in a digital document. “Abstract Information” refers to the actual intellectual content contained in the digital object.

  4. BitstreamFormat Renovation Prototype Problems with Current Format Technical Metadata • Formats are identified with arbitrary names; that hinders interoperability • No means to collect additional format technical metadata, e.g. format specification documents. • Identifying formats only by filename extension is imprecise and unreliable • Current internal format model is inflexible

  5. BitstreamFormat Renovation Prototype Terms • Format Registry • PRONOM • GDFR • Identification Plugins • DROID • JHOVE • Interoperable Format Identifiers • MIME Type • PUID (PRONOM Unique IDentifier)‏

  6. BitstreamFormat Renovation Prototype Object-Model Architecture Connected to PRONOM

  7. BitstreamFormat Renovation Prototype Identification of Two BitstreamFormat Types

  8. BitstreamFormat Renovation Prototype The Local “DSpace” and Provisional Registries

  9. BitstreamFormat Renovation Prototype Interface to External Registries • Get Synonyms • Returns a list of identifiers that are bound to the same format record • Import • Turns an external format description into a new BitstreamFormat entry, initializing its metadata fields from the external registry • Update • Refresh the metadata fields of a BitstreamFormat to keep up with changes • ConformsTo • Tests whether the format described by one identifier “conforms to” or is a sub-type of another format

  10. BitstreamFormat Renovation Prototype The Bitstream Format Metadata Admin Panel

  11. BitstreamFormat Renovation Prototype Importing New Bitstream Formats

  12. BitstreamFormat Renovation Prototype Editing BitstreamFormat Metadata

  13. BitstreamFormat Renovation Prototype Digital Preservation Strategies • Pluggable architecture allows for access to external identification and technical metadata tools • Access and preservation rely on accurate format identification • Migration / Obsolescence tools are only effective with correct and precise identification, because format versions matter • The creation of derivatives (i.e. thumbnails or delivery versions) via MediaFilter will also rely on accurate identification

  14. BitstreamFormat Renovation Prototype Interoperability Benefits • Avoids platform lock-in • Reliable delivery functionality • Consistent object description semantics (ORE)‏ • Interoperability with digital preservation services

  15. BitstreamFormat Renovation Prototype Quantitative Results • Before: • 1,020 Unidentified (0.65%)‏ • After: • 162 Unidentified (0.104%)‏ DSpace@MIT (155,000 Bitstreams)‏

  16. BitstreamFormat Renovation Prototype Related Links • http://wiki.dspace.org/index.php/BitstreamFormat_Renovation • http://www.nationalarchives.gov.uk/PRONOM/ • http://droid.sourceforge.net/wiki/index.php/Introduction • https://collaborate.oclc.org/wiki/gdfr/about.html • http://www.loc.gov/standards/premis/ • http://pilot.apsr.edu.au/wiki/index.php/AONS_II • http://www.ijdc.net/ijdc/article/view/53/ • http://hul.harvard.edu/jhove/ • http://web.mit.edu/sands/www/bfr

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