Table of Contents
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- Imaging Services will not produce images produce images or associated metadata files in formats, or to special format-encodings or technical specifications required by external partners when these specification differ standard technical specifications, that require a deviation from IS workflows developed to make produce digital content that is to be stored by Harvard Library's Digital Repository Service.Responsibilities for converting data and the provision resources that meet local, Harvard Library requirements.
- Responsibility for converting the data IS provides, or the creation of any supplemental data need to satisfy external partner requirements are to be borne by the owning , are the responsibility of the repository that has contracted with Imaging ServicesIS for services.
Description of files
- Image files are encoded in compliance with the JPEG2000 standard
- Data compression: irreversible 9-7 wavelet transform for lossy compression, or reversible 5-3 wavelet transform for lossless compression.
- Photometric interpretation:
- RGB (color), 8-bits per channel, embedded sRGB ICC profile.
- Grayscale, 8 or 16-bits per channel, embedded sGray ICC profile.
- OCR plain text files are in UTF-8 encoding. (optional, not available for photograph, film, and art objects)
- OCR alto files conform to the ALTO standard. (optional, not available for photograph, film, and art objects)
- Structural metadata files conform to the METS standard and Harvard's METS profile for page-turned objects. (optional, not available for photograph, film, and art objects)
- MARC record files are in MARCXML or MODS format. (optional, not available for photograph, film, and art objects).
- Packaging tag files generated by the packaging application (Bagit) describe the package. (optional)
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[UNIQUE_ID]: Usually this will be a catalog record ID1. For example, a 9-digit HOLLIS ID (e.g. 011835322) will be recommended for an item that has been cataloged in Harvard’s HOLLIS catalog system. In the case of manuscript collections, the library or archives repository will provided a unique identifier from HOLLIS for Archival Discovery or local tracking system. In the case of photograph or other art objects, the library or archives repository will provide a unique identifier from JSTOR Forum or local tracking system.
[Volume_number]: (multi-volume sets only) 1 or more digits zero padding volume sequence number with a prefix 'v' (e.g. v5, v05 or v0005).
- [Issue_number]: (multi-issue sets only) 1 or more digits zero padding issue sequence number with a prefix 'n' (e.g. n2, n02 or n002).
- [Sequence_number]: 4-digit or 5-digit page sequence number (e.g. 0045, 00045). This will not apply to photograph or art object image files.
- .jp2: File format (JPEG 2000, part 1) extension.
Examples:
- Single volume file name examples: 010010723_0001.jp2, 990079903010203941_0001.jp2
- Multi-volume file name examples: 008105127_v0007_0001.jp2, 990041786900203941_v0001_0001.jp2
- Multi-volume and multi-issue file name examples: 008105127_v0007_n003_0001.jp2
- Manuscript collection file name examples: morgan_601_705_volIV_0001.jp2, sch01593c00004_0001.jp2
- Photographs, films, art objects file name examples: SS_24369503.jp2, G3884_P4A9_1864_M3.jp2, LA-GD-UF-3-03B-CT.jp2
Note:
Occasionally, a project may require a different file name pattern due to project partners' specific need. For example, The Black Teacher Archive Project need to name file as [Project_code]_[OCLC#]_[State_code]_[Year]_[Volume#]_[Issue#]
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For monograph and manuscript materials, we group files into items and items into a batch3. For example, the following batch contains three items. Two items contain only JPEG2000 image files, and one item contains JPEG2000, OCR plain text, and OCR ALTO XML files.
[BATCH ID] (example: Batch02 or Box03) |-- [UNIQUE_ID]-mets.xml (single volume METS file example: 007984492-mets.xml) |-- [UNIQUE_ID]_[VOLUME_ID]-mets.xml (multivolume METS file example: 000652831_v0002-mets.xml) |-- [UNIQUE_ID]-mets.xml (manuscript collection METS file example: morgan_601_705_volIV-mets.xml) |-- [HOLLIS_ID].xml (MARCXML or MODS xml file, e.g., 000652831.xml)
| |-- [UNIQUE_ID]/ (manuscript collection example, e.g. morgan_601_705_volIV) | |-- [UNIQUE_ID]_[####].jp2 |-- morgan_601_705_volIV_0001.jp2 |-- morgan_601_705_volIV_0002.jp2 |-- morgan_601_705_volIV_0003.jp2 |-- morgan_601_705_volIV_0004.jp2 ... |-- morgan_601_705_volIV_0099.jp2
| |-- [HOLLIS_ID]/(single volume monograph example, e.g. 007984492) | |-- [HOLLIS_ID]_[####].jp2
|-- [HOLLIS_ID]_[####].txt
|-- [HOLLIS_ID]_[####].xml |-- 007984492_0001.jp2
|-- 007984492_0001.txt
|-- 007984492_0001.xml |-- 0079984492_0002.jp2 ... |-- 007984492_0099.jp2
|-- 007984492_0099.txt
|-- 007984492_0099.xml
| |-- [UNIQUE_ID]_[VOLUME_ID]/ (multi-volume example, e.g. 000652831_v0002) | |-- [VOLUME_ID]_[v####]_[####].jp2 |-- 000652831_v0002_0001.jp2 |-- 000652831_v0002_0002.jp2 |-- 000652831_v0002_0003.jp2 ... |-- 000652831_v0002_0099.jp2
Here is another example from Black Teacher Archive Project showing a batch with project specific file name patterns.
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Organization of files with "Bagit" packaging
<root directory>
|-- bag-info.txt
|-- bagit.txt
|-- manifest-md5.txt
|-- tagmanifest-md5.txt
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|-- data
|-- [ THE SAME DIRECTORY STRUCTURE AS THE SIMPLE PACKAGING ABOVE ]Delivery media and transfer method
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- Hard disk, flash drive
- The repositories can borrow the media from Imaging Services or pay for them
- Recommended for large sets of data
- Google shared drive
- A google account from the data recipient needs to be provided to Imaging Services
- MS shared directory
- The data recipient's email address needs to be provided to Imaging Services
- Suitable for small sets of data
- Secure file transfer (https://filetransfer.harvard.edu)
- The data recipient's email address needs to be provided to Imaging Services.
- The data recipient outside Harvard University needs to set up a guest account.
- Suitable for small sets of data which need encryption during file transfer.
In cases where the record identifier includes space, the spaces will be replaced by underscores.Anchor note1 note1
MARCXML and MODS XML record files are only available for items that have been cataloged in Harvard’s bibliographic database, HOLLIS.Anchor note2 note2
Batch level identifiers are assigned to groups of titles prepared and submitted together for scanning. These named “batches” will be maintained from scanning all the way through deposit to Harvard's Digital Repository Service and transfer of data to project partners beyond the Harvard libraries. Inclusion of technical metadata is optional.Anchor note3 note3