Cross Collection Discovery FAQ

1. What kinds of collections are included in Cross Collection Discovery (CCD)? 

CCD includes metadata records for collections from the Yale University Art Gallery, the Yale Center for British Art, the Yale Peabody Museum of Natural History, and the Yale University Library. It also includes metadata records for content available through the Yale University and Campus YouTube channels, Yale University on iTunesU, and Open Yale Courses.

The range of content discoverable through CCD encompasses art objects, cultural artifacts, photographs, rare books and manuscripts, historical and rare maps, historical medical instruments, specimens, speeches, lectures, and campus events.

2. Are all of the collections in CCD available online?

Of the 1.5 million records available online through CCD, approximately 250,000 of the records are accompanied by digital assets, either digitized reproductions (primarily images) or born digital content (primarily audio or video). The number of digital assets is expected to grow as more content is digitized.

3. How were the records selected?

The criteria for selection were determined by the units contributing the records and may have included one or more of the following:

  • A record exists for the item, or the level of cataloging is sufficient for search.
  • No known restrictions on access or use apply to the item described.
  • The item has been digitized.

 Based on these criteria, some units are making records for all of their collections available, while other units are making selected records that have been vetted by curators available through CCD.

4. How do I contribute metadata records to CCD?

 Yale units and departments may contribute metadata records to CCD by contacting CCD uses the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) to harvest metadata records. Records may also be provided via a file share, an RSS feed, or an API.

5. How can I harvest metadata records from CCD?

To find out more about harvesting metadata records from CCD, please contact Records may be harvested via OAI-PMH or may be accessed via Solr APIs. The OAI data provider is available to the world. API access is available to the Yale community.

6. Which metadata formats are supported?

Metadata records are provided in their original format and in a stub Dublin Core record. Metadata formats include the following:

  • CDWA-Lite and LIDO: Yale University Art Gallery, Yale Center for British Art
  • Darwin Core: Yale Peabody Museum of Natural History
  • Dublin Core: Open Yale Courses, Yale University and Campus YouTube channels, Yale University on iTunesU
  • MARCXML: Sterling Memorial Library Map Collection
  • MODS: Beinecke Digital Library

 7. What is the difference between CCD and Discover Yale Digital Content?

CCD is a service supported by the Yale Office of Digital Assets and Infrastructure to provide metadata records harvested from Yale collections, programmatically and to end users. Discover Yale Digital Content is a user interface for the metadata records aggregated via CCD. The interface is available at:

Learn more about Cross Collection Discovery at Yale.