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Still Image Content
| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | AccessDelivery | ||||
| Still Image | Preferred (in order of preference) | TIFF uncompressed in any color space supported by TIFF | X | TIFF 6.0 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 compression | X | X | Some 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 the JPEG 2000 website.; rendered by Image Delivery Service (IDS) | ||
| TIFF with CCITT T.6 (Group 4) compression | X | ||||
| JPEG 2000 JP2 profile with lossy compression | X | X | Rendered by Image Delivery Service (IDS) | ||
| JPEG JFIF; TIFF with associated alpha component; TIFF with PackBits (lossless), LZW (lossless), Modified Huffman or Group 3 Fax compression | X | X | Rendered by Image Delivery Service (IDS) | ||
| GIF | X | X | Rendered by Image Delivery Service (IDS) | ||
| Accepted | JPEG (non-JFIF) | X | X | (suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression); rendered by Image Delivery Service (IDS) | |
| TIFF with JPEG (lossy) compression | X | (suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression) | |||
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Harvard Library Media Preservation Services will provide reformatting services to produce these formats.*
| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | AccessDelivery | ||||
| Video | Preferred | Codec: 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 | X | Any of the 21 different profiles; delivered by Streaming Delivery Service (SDS) | |||
| Accepted | Codec: Avid DNxHD Wrapper: QuickTime, MXF (MXF OP1a, OP1b operational patterns or AS-07) | X | |||
| Codec: Apple ProRes Wrapper: QuickTime | X | ||||
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| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | AccessDelivery | ||||
| Disk Image | Preferred | RAW (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). | |
| ISO | X | 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/CUE | 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). 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). | |||
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| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | AccessDelivery | ||||
| 2D CAD Drawing | Preferred | Portable Document Format (PDF) | X | X | embed fonts and linked files embedded; rendered by File Delivery Service (FDS) |
| AutoCAD Drawing (DWG) | X | X | prefer embed fonts and linked files embedded; rendered by File Delivery Service (FDS) | ||
| Drawing Interchange Format (AutoCAD DXF) | X | X | prefer embed fonts and linked files embedded; rendered by File Delivery Service (FDS) | ||
| 3D CAD Drawing | Preferred | Portable Document Format (PDF) | X | X | embed fonts and linked files embedded and embedded 3D content in U3D or PRC format; rendered by File Delivery Service (FDS) |
| AutoCAD Drawing (DWG) | X | X | prefer embed fonts and linked files embedded; rendered by File Delivery Service (FDS) | ||
| Drawing Interchange Format (AutoCAD DXF) | X | X | prefer embed fonts and linked files embedded; rendered by File Delivery Service (FDS) | ||
| Extensible 3D Graphics (X3D) | X | X | prefer xml encoding to binary or vrml; rendered by File Delivery Service (FDS) | ||
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Audio Formats
| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | AccessDelivery | ||||
| Audio | Preferred | Waveform Audio (WAV) | X | ||
| MPEG-4 Audio (MP4) | X | ||||
| MPEG 1/2 Audio Layer 3 (MP3) | X | Delivered by Streaming Delivery Service (SDS) | |||
| Accepted | Audio Interchange File Format (AIFF) | X | |||
| RealAudio - SMIL with sequential links to RealAudio files | X | Rendered Delivered by Streaming Delivery Service (SDS) | |||
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| Content | Preference | Format | Format Use | Notes | ||
|---|---|---|---|---|---|---|
| Preservation | AccessDelivery | |||||
| Word Processing | Preferred | Portable Document Format (PDF), PDF/A or PDF/X | X | X | Rendered by File Delivery Service (FDS) | |
| Harvard Library Delivery Service | Supported Formats | |||||
| Accepted | Native file format: - e.g. Microsoft Word Binary File Format (DOC), Office Open XML Document (DOCX), Rich Text Format (RTF), WordPerfect Document (WPD) with normalized "fixed" preservation derivative: - e.g. Portable Document Format (PDF) | X | ||||
Formats for Delivery Copies
| X | Rendered by File Delivery Service (FDS)Technically any format. Initially FDS will only deliver the following formats until additional access/use policy and metadata is developed and implemented: ICC, PDF, Plain Text, SGML, XML, ZIP. |
| Full-text Search Service (FTS) | Plain text in ASCII or UTF-8 character encoding |
| Image Delivery Service (IDS) | JPEG, GIF, JPEG2000 JP2, TIFF |
| Page Delivery Service (PDS) | Page images: JPEG2000 JP2, JPEG, GIF, TIFF (bitonal, CCITT Group 4 Fax compression) Page text: Plain text in ASCII or UTF-8 character encoding |
| Streaming Delivery Service (SDS) MP3 RealAudio, SMIL with sequential links to RealAudio files |