CDR Summer 2011 enhancements

The CDR development team has been busy this spring and summer building enhancements to both back-end and public-facing components of the repository.  The result is a much stronger CDR this fall.  Here’s a list of the major new features we’ve released since June.

User Interface

  • The repository’s user interface has been completely redesigned to be more visually appealing and to make it easier for users to preview and download the content they find
  • Integrated dynamic content on the CDR home page, such as featured collections, news items from the blog, and a feed of the most recently added materials
  • Enabled the display of thumbnail images throughout the site and introduced jpeg 2K previews on full record pages
  • Implemented inline viewer for jpeg 2K images using the Djatoka image server
  • Implemented inline.mp3 and .mp4 playback using incremental download
  • All available descriptive information now displayed on an object’s full record page

Access enhancements

  • Enabled search engine crawling–CDR materials available through web search engines
  • Improved local indexing returns more relevant search results
  • Created advanced search interface
  • Enabled faceted browsing of repository materials.  Users can browse by the repository or collections structure, or limit results by collection, academic department, format, language, or subject

Access control

  • Group-based access control applied at the object level
  • Integrated with public user interface to display only content that is available to a given user
  • Support for embargoes at the object level
  • Uses Fedora’s internal access controls
  • Integrates with campus Shibboleth and Grouper services


  • Supports for access control in metadata, including embargo
  • Improved schema-based METS and MODS support
  • Includes support for multiple networked staging areas, including iRODS and the Library’s digital archive, reducing the amount of time spent moving large files over the network for ingest staging

Mid-tier services

  • Derivative image generation and processing on ingest
  • Technical metadata extraction using FITS
  • Indexing of new or modified metadata is faster
  • Mid-tier processing “catch-up” services are now on a scheduler that runs nightly instead of having to be manually invoked

Solr index redesign

  • Index schema completely re-designed to drive enhanced access through the new UI
  • Solr ingest is multi-threaded and several orders of magnitude faster than previous implementation.
  • Virtually all reindexes happen without system downtime
  • More data is indexed, improving retrieval
  • Search algorithm is improved, resulting in fewer false hits in search results

Code clean-up

  • Consolidated multiple build files into one master build file.  Reorganized code to streamline code integration process.
  • Audited code for sensitive information and placed configuration files in private repository to prepare for release of CDR on github.
  • Implemented Jenkins for nightly integration of code updates into the repository.  This reduces the problems that can occur when multiple developers are working on divergent local code bases.
  • CDR code released on GitHub in September 2011.
Posted in CDR Updates


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