Difference between revisions of "Format policies"

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*Library of Congress states that [http://www.digitalpreservation.gov/formats/fdd/fdd000188.shtml Adobe Digital Negative (DNG), Version 1.1] may be emerging as a standard preservation format for raw camera images. Adobe provides a free (but not open-source) [http://www.adobe.com/products/dng/ Adobe DNG Converter] designed for downloading to Windows or Mac computers.
 
*Library of Congress states that [http://www.digitalpreservation.gov/formats/fdd/fdd000188.shtml Adobe Digital Negative (DNG), Version 1.1] may be emerging as a standard preservation format for raw camera images. Adobe provides a free (but not open-source) [http://www.adobe.com/products/dng/ Adobe DNG Converter] designed for downloading to Windows or Mac computers.
 
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|TIF or TIFF (Tagged Image File Format)
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|Normalization to Portable Network Graphics (PNG) format with embedded metadata stored in [http://xena.sourceforge.net/ Xena] XML.
 
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*Normalization of TIFF 6.0 files may not be necessary. since TIFF 6.0 itself is considered by some to be a preservation format. See, for example, TIFF 6.0 Action Plan and Action Plan Background Report at [http://www.fcla.edu/digitalArchive/formatInfo.htm Florida Digital Archive] format information page.
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*For more information on TIFF files see [http://www.digitalpreservation.gov/formats/fdd/fdd000022.shtml Library of Congress Sustainability of Digital Formats: TIFF, Revision 6.0] and [http://www.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=612 PRONOM: Tagged Image File Format 6].
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*For more information on PNG files see [http://www.digitalpreservation.gov/formats/fdd/fdd000153.shtml Library of Congress Sustainability of Digital Formats: PNG, Portable Network Graphics].
 
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Revision as of 16:51, 7 December 2009

Main Page > Documentation > Format-specific preservation issues


Format Preservation action plan Issues and links
DOC (Microsoft Office Word)
  • Normalization to OpenDocument Format (ODF) using Xena
  • Possible normalization to Portable Document Format/Archival (PDF/A).
NEF (Nikon Electronic Format, also known as Nikon Image Format) Possible normalization to Adobe Digital Negative (DNG) format
  • NEF is a raw (i.e. pre-processed) image format produced by Nikon cameras.
  • Xena incorrectly guesses the file type as TIFF and normalizes as it would a TIFF, with the result that a very large file (e.g. 70 MB) is normalized to a very small one (eg. 250 KB) with considerable loss of data. Xena also removes embedded data added during image editing, converting the data to a separate XMP file. This means that any edits added by the creator are removed.
  • NEF is a proprietary format with an unpublished specification.
  • NEF files can be very large - 70 MB or more.
  • PRONOM provides only outline information for NEF files: see PRONOM: Nikon Digital SLR Camera Raw Image File.
  • Much more detailed information on NEF files is available at Library of Congress Sustainability of Digital Formats: Camera Raw Formats.
  • Library of Congress states that Adobe Digital Negative (DNG), Version 1.1 may be emerging as a standard preservation format for raw camera images. Adobe provides a free (but not open-source) Adobe DNG Converter designed for downloading to Windows or Mac computers.
TIF or TIFF (Tagged Image File Format) Normalization to Portable Network Graphics (PNG) format with embedded metadata stored in Xena XML.