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Still Image Formats

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
Still ImagePreferred (in order of preference)TIFF uncompressed in any color space supported by TIFFX TIFF has been commonly used at Harvard for digital master images, and is considered an archival format suitable for long-term preservation. For more information about the TIFF format see Adobe's TIFF resources
JPEG 2000 JP2 profile with lossless compressionXXSome projects depositing content into the DRS have chosen to use JPEG 2000 for digital master images instead of TIFF. JPEG 2000 can offer storage savings - file sizes tend to be smaller and there is an opportunity to use the same file as the preservation and use copy. While JPEG 2000 is becoming more acceptable in the library community as a preservation format, there are still advantages to TIFF over JPEG 2000 for preservation. TIFF uncompressed is a simpler format internally and has more general tool support. For more information about JPEG 2000 see the JPEG 2000 website; delivered by Image Delivery Service (IDS)
TIFF with CCITT T.6 (Group 4) compressionX  
JPEG 2000 JP2 profile with lossy compressionXXDelivered by Image Delivery Service (IDS)
JPEG JFIF; TIFF with associated alpha component; TIFF with PackBits (lossless), LZW (lossless), Modified Huffman or Group 3 Fax compressionXXDelivered by Image Delivery Service (IDS)
GIFXXDelivered by Image Delivery Service (IDS)
AcceptedJPEG (non-JFIF) XX(suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression); delivered by Image Delivery Service (IDS)
TIFF with JPEG (lossy) compressionX  (suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression)

 


Video Formats

Harvard Library Media Preservation Services will provide reformatting services to produce these formats.*

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
VideoPreferredCodec: JPEG 2000*
Wrapper: QuickTime, MXF (MXF OP1a, OP1b operational patterns or AS-07)
X Recommend lossless compression
Codec: Uncompressed*
Wrapper: QuickTime
X 8 bit or 10 bit
Codec: DV*
Wrapper: QuickTime
X For digitized DV tape
Codec: MPEG-2
Wrapper: QuickTime
X  
Codec: H.264*
Wrapper: QuickTime
 XAny of the 21 different profiles; delivered by Streaming Delivery Service (SDS)
AcceptedCodec: Avid DNxHD*
Wrapper: QuickTime, MXF (MXF OP1a, OP1b operational patterns or AS-07)
X  
Codec: Apple ProRes*
Wrapper: QuickTime
X  

 


Disk Image Formats

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
Disk ImagePreferredRAW (IMG,DD)X Often disk image formats are split into smaller files that are stitched together in sequence, often in 2GB chunks. When this occurs, many systems use sequential file extension numbering to delineate the relationships, e.g., myimage.001, myimage.002, myimage.003; or yourimage.e01, yourimage.e02, yourimage.e03. When this occurs, it is imperative that original filenames AND extensions be preserved so that they can be re-instantiated upon delivery to an end user (otherwise it will not be possible to put the sequence back together in the proper order).
ISOX There are possibilities that some ISO files are merely RAW files that contain ISO file systems within them. Some ISO files may be pure copies of ISO file systems.
BIN/CUEX Often disk image formats are split into smaller files that are stitched together in sequence, often in 2GB chunks. When this occurs, many systems use sequential file extension numbering to delineate the relationships, e.g., myimage.001, myimage.002, myimage.003; or yourimage.e01, yourimage.e02, yourimage.e03. When this occurs, it is imperitave that original filenames AND extensions be preserved so that they can be re-instantiated upon delivery to an end user (otherwise it will not be possible to put the sequence back together in the proper order). Only .BIN files (and sometimes .ISO files) include sidecare .CUE files. The .CUE files serve as metadata for understanding the type and composition of data stored in the .BIN (or .ISO) file.
EWF-E01 (EWCF-ASR02)X Often disk image formats are split into smaller files that are stitched together in sequence, often in 2GB chunks. When this occurs, many systems use sequential file extension numbering to delineate the relationships, e.g., myimage.001, myimage.002, myimage.003; or yourimage.e01, yourimage.e02, yourimage.e03. When this occurs, it is imperitave that original filenames AND extensions be preserved so that they can be re-instantiated upon delivery to an end user (otherwise it will not be possible to put the sequence back together in the proper order). 

 


CAD Formats 

Deposit the native CAD file together with a derivative PDF and make both deliverable. The PDF provides an alternative “fixed” preservation copy, providing mitigation for future obsolescence/rendering risks; while the native CAD file provides a truer version of the original, for users who are able to still read the format.

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
2D CAD DrawingPreferredPortable Document Format (PDF)XXembed fonts and linked files; delivered by File Delivery Service (FDS)
AutoCAD Drawing (DWG)XXembed fonts and linked files; delivered by File Delivery Service (FDS)
Drawing Interchange Format (AutoCAD DXF)XXembed fonts and linked files; delivered by File Delivery Service (FDS)
3D CAD DrawingPreferredPortable Document Format (PDF)XXembed fonts and linked files and embedded 3D content in U3D or PRC format; delivered by File Delivery Service (FDS)
AutoCAD Drawing (DWG)XXembed fonts and linked files; delivered by File Delivery Service (FDS)
Drawing Interchange Format (AutoCAD DXF)XXembed fonts and linked files; delivered by File Delivery Service (FDS)
Extensible 3D Graphics (X3D)XXprefer xml encoding to binary or vrml; delivered by File Delivery Service (FDS)

 


Audio Formats

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
AudioPreferredWaveform Audio (WAV)X  
MPEG-4 Audio (MP4)X  
MPEG 1/2 Audio Layer 3 (MP3) XDelivered by Streaming Delivery Service (SDS)
AcceptedAudio Interchange File Format (AIFF)X  
RealAudio XDelivered by Streaming Delivery Service (SDS)

 


Word Processing Formats

Deposit the native word processing file together with a derivative PDF (PDF/A if possible) and make both deliverable. The PDF provides an alternative “fixed” preservation copy, providing mitigation for future obsolescence/rendering risks; while the native word processing file provides a truer version of the original, for users who are able to still read the format.

Documents should not have DRM, including passwords or encryption. 

ContentPreferenceFormatFormat UseNotes
   PreservationDelivery 
Word ProcessingPreferredPortable Document Format (PDF), PDF/A or PDF/XXXDelivered by File Delivery Service (FDS)
 

Microsoft Word Binary File Format (DOC)

XXDelivered by File Delivery Service (FDS)
 Office Open XML Document (DOCX)XXDelivered by File Delivery Service (FDS)
 Rich Text Format (RTF)XXDelivered by File Delivery Service (FDS)
 WordPerfect Document (WPD)XXDelivered by File Delivery Service (FDS)
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