Difference between revisions of "Format policies"

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|MP3
 
|MP3
 
|FFmpeg
 
|FFmpeg
|We may also wish to consider FLAC as a preservation format for audio files. It is less well-known in the archival community but is a fully lossless, openly-specified, non-proprietary audio format.
+
|
 
|-
 
|-
 
|[[Presentation files]]
 
|[[Presentation files]]
 
|
 
|
 
|Open Document Format; PDF/A
 
|Open Document Format; PDF/A
|PDF or PDF/A
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|PDF
 
|Xena or OpenOffice Impress
 
|Xena or OpenOffice Impress
 
|Xena may be preferable, since it appears to produce a more accurate representation of the original.
 
|Xena may be preferable, since it appears to produce a more accurate representation of the original.

Revision as of 15:01, 9 March 2010

Main Page > Documentation > Media type preservation plans


Migration and emulation

Archivematica maintains the original format of all ingested files to support migration and emulation preservation strategies.

Normalization

Archivematica's primary preservation strategy is to normalize files to preservation and access formats upon ingest. The choice of access formats is based on the ubiquity of viewers for the file format. Archivematica's preservation formats are all open standards. Additionally, the choice of preservation format is based on community best practices, availability of open-source normalization tools, and an analysis of the significant properties for each media type.

Media type preservation plans

Media type File formats Preservation format(s) Access format(s) Normalization tool Comments
Audio LPCM/WAVE MP3 FFmpeg
Presentation files Open Document Format; PDF/A PDF Xena or OpenOffice Impress Xena may be preferable, since it appears to produce a more accurate representation of the original.
Raster images TIFF, JPEG2000 or PNG PNG ImageMagick Note: does not include raw camera files.

Since TIFF, JPEG2000 and PNG are all good formats for preservation, we could leave any files in those formats as they are (as long as they are uncompressed or losslessly compressed). However, we could normalize other formats, such as JPEG, GIF and BMP, to one of the preservation formats.

Raw camera files DNG TIFF or PNG DigiKam DNG Converter
Spreadsheets Open Document Format OpenOffice Calc
Vector images SVG
Video Motion JPEG2000/MXF or MPEG-2/MXF OGG,FLV FFmpeg Motion JPEG2000 is the emerging preferred standard for video files but it is hard to find a tool for Linux that converts to that codec. MPEG-2 is an accepted standard, however, which is in use by a number of institutions.
Word processing files Open Document Format; PDF/A PDF or PDF/A OpenOffice Writer PDF/A normalization of MS Word files is somewhat problematic because best results are achieved from within the native application - i.e. MS Office running in MS Windows. Archivematica does not support either Windows or MS Office since these are proprietary software packages.
Format Also known as File extension(s) Normalization tool
Adobe Extensible Metadata Platform Adobe XMP .xmp
Adobe Illustrator drawing Adobe AI .ai
Advanced Stream Redirector file Microsoft ASX Playlist .asx
Audio/Video Interleaved Format AVI .avi
Batch file
  • MS-DOS batch file
  • MS-Windows batch file
.bat
Cascading Stylesheet .css Xena
Comma Separated Values file .csv Xena
Command Source Code .cmd
Document type definition .dtd
Encapsulated PostScript .eps
Extensible Markup Language .xml Xena
Extensible Stylesheet Language .xsl
Graphics Interchange Format GIF .gif Xena
Hypertext Markup Language
  • .html
  • .htm
Xena
JavaScript file
  • JavaScript programming files
  • JScript files
.js Xena
Java archive file .jar Xena
Joint Photographic Experts Group JPEG .jpg Xena
Macromedia FLV Flash Video .flv
Microsoft Excel Workbook
  • Microsoft Excel
  • Binary Interchange File Format (BIFF)
.xls Xena
Microsoft Icon file .ico
Microsoft Powerpoint Presentation .ppt Xena
Microsoft Word for Windows MS-WORD .doc Xena
Moving Picture Experts Group file MPEG .mpg
MPEG-1 Audio, Layer 3 MP3 .mp3 Xena
Nikon Electronic Format
  • Nikon Image Format
  • Nikon Digital SLR Camera Raw Image File
.nef
Perl script .pl Xena
Portable Document Format .pdf Xena
Portable Network Graphics .png Xena
Python script file .py Xena
Quicktime (video)
  • MOV
  • QT
.mov
Real Media Metafile .ram
Rich Text Format .rtf Xena
Scalable Vector Graphics .svg Xena
Shockwave Flash file .swf
SQL code .sql Xena
Truevision TARGA file
  • Truevision Advanced Raster Graphics Adapter
  • Truevision Graphics Adapter
.tga, .tpic
Tagged Image File Format .tiff, .tif Xena
Visual Basic Scripting file
  • C Source Code
  • Microsoft Active Scripting language
  • VBScript
.vbs Xena
Waveform Audio Wave Audio File Format .wav Xena
Windows Bitmap Image file .bmp Xena
Windows Media Audio .wma
Windows Media Player file .wmv