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Documents delivered by PDS can be used in ways similar to their print counterparts, for example, browsed through a table of contents or viewed page-by-page. PDS also offers tools to manipulate pages (zoom, rotate, pan), a full-text keyword search of document contents, and an option to create a PDF of the document for printing.
To learn more about the PDS web interface, consult the PDS User Guide.
Who can use PDS?
Any Harvard organizational entity that is registered to use DRS is eligible to use PDS. All of the files associated with digital objects to be delivered in PDS must be stored in DRS. To verify your DRS status, check the DRS Owner List. To register for DRS, consult the Planning section of the DRS website. For more information on how to take advantage of the Page Delivery Service, send an inquiry to the LTS Support Center.
What are PDS file requirements?
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Structural metadata identifies all the components of a document, describes its structure, and allows for page-turning navigation. Each PDS document (or group of documents) must be accompanied by a structural metadata file formatted in XML according to the standardized METS schema, an encoding format for descriptive, administrative, and structural metadata for textual and image-based works. (See the Harvard METS profile for PDS for more information about the Harvard METS implementation for page-turned materials.)This This structural metadata is generated during batch creation and stored within the PDS object's descriptor.xml file. This XML file also contains descriptive metadata about the original source material that is used for the display labels in PDS and to maintain a permanent connection between the digital object and the original source material. The XML metadata file can be produced in-house or by a reformatting vendor. Details about PDS structural metadata are provided in the PDS Workflow document.
Captions for page images
DRS collection curators can request that image captions be applied to the page images stored in the DRS and delivered by the Page Delivery Service. SeeSee Image Captions [pdf] for for more information.
Setting maximum delivery size
The default maximum size for digital images delivered by the Page Delivery Service (PDS) is 2400 pixels in the largest dimension. But curators can set a lower maximum delivery size for their page images on a per-billing-code basis. See Image Delivery Size Restriction [pdf] for for more information.
Sample Harvard
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documents using PDS
The Harvard/Radcliffe Online Historical Reference Shelf provides links to annual reports and narrative histories that are delivered by PDS.
The Women Working collection compiled by the HUL Open Collections Program offers a variety of digitized books, diaries, and manuscripts delivered through PDS.PDS urls have this syntax:
- Production: http://pds.lib.harvard.edu/pds/view/[DRS object ID]
- QA/test: http://pdstest.lib.harvard.edu:9005/pds/view/[DRS object ID]
Links to sample documents delivered by PDS:
- A book from Schlesinger Library
- Historic legislation concerning Harvard from the Harvard University Archives
- A photograph album from Harvard-Yenching Library
- A musical score from the Loeb Music Library
- A manuscript from the Arnold Arboretum