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Harvard Library Viewer Update

Harvard Library has launched its new page viewer for the Digital Repository Service.


The launch of the Harvard Library Viewer, built using the International Image Interoperability Framework (IIIF) standard and the open-source Mirador image viewer, provides a new and improved way to access Harvard Library’s collections in the Digital Repository Service. It improves the user experience with intuitive image zooming and panning, two-page views, and the ability to display oversize items, such as scrolls.

The new Viewer interface will automatically display for page-turned objects discovered through HOLLIS+ and HOLLIS Classic. No action needs to be taken by library users to update the links they already visit; only the displayed interface will change. Large documents and serials with 5000 pages or more will continue to display in the older Page Delivery Service (PDS) for now, pending the completion of metadata migration to the new DRS. 

The Viewer preserves functionality from the Page Delivery Service with important image display enhancements. As in the prior PDS, users can:

  • Cite—view and copy resource and page level citation information such as title, repository, and persistent links 
  • Search—perform keyword searching within an item when full text is available
  • View Text—display full text for a page when it is available
  • Print—specify page, page range, or entire item to convert to PDF and deliver via browser
  • View Related Links—view links to related items or information (e.g., a link to the item in HOLLIS or to the finding aid in OASIS) 

The initial Viewer release includes basic support for multiple windows to view and compare International Image Interoperability Framework (IIIF)-compatible documents from any institution, side-by-side. Future plans for the new Harvard Library Viewer include the ability to manage multiple documents intuitively and to save and restore portfolios of documents. The Mirador community is working on enhancements for features such as drag-and-drop to populate a new window for comparison view, annotation of pages and subregions of pages, and transcription. The open source platform offers the opportunity for expanded applications for teaching and research within the Harvard Library context. Visit the wiki for more details.

Article written by Harvard Library Communications.
Article published on March 16, 2016.