The CDRS provides professional "library to library" reference service to researchers any time, anywhere, through an international network of libraries and related institutions. Cooperative Partners include the Library of Congress, OCLC, Reference and Users Services Association of the American Libraries Association, Library Systems and Services (LSSI), and Virtual Reference Desk (VRD) with over 100 participating member libraries. The service uses new technologies to provide the best answers in the best context, by taking advantage of Internet resources, localized print and archival collections, as well as the knowledge of staff in general and specialist libraries. The CDRS process begins when the Requesting Library enters a question (on behalf of their client) into the system with additional "metadata" including keywords, subjects, education level, turnaround time needed, sources already consulted, etc. Once the question has been answered, a notification is sent back to the Requesting Library that an answer is available and waiting. Future enhancements may include other processes like interlibrary loans, information on where to buy cited books, and/or document delivery functions.