SRU Update and the Dutch Union Catalogue
By Janifer Gatenby, OCLC Leiden Office
In February 2008, the Nederlandse Centrale Catalogus (NCC: the Dutch Union Catalogue)* started updating WorldCat in real time. As Dutch librarians create new bibliographic records and add new holdings to new and existing records in the NCC, WorldCat is simultaneously and automatically updated behind the scenes. Thus, all new data is visible in WorldCat within seconds, even though it is entered via a local interface. Once in WorldCat the data is exposed to a global audience via the freely available site WorldCat.org. The data is also formatted and made available to the major search engines, in particular Google and Yahoo and various other major sites such as Facebook. Many sites, including an increasing number of blog sites have downloaded the WorldCat search box allowing direct searching from their pages. Other sites are accessing WorldCat via their own programs using the WorldCat API (Application Program Interface).
The importance of up to date and comprehensive information in all potential discovery environments cannot be overstated; users may search wherever they choose and librarians can be confident that these users will be able to retrieve the same resources, no matter their point of entry.
In 5 months of operation of SRU update, the NCC has added to WorldCat more than 1.5 million holdings and 230,000 bibliographic records with a time between appearance in one catalogue and appearance in the other averaging less than 5 seconds. For the first two months, there were two streams of data, ongoing regular work and a gap load of records processed between the initial batch load and the live date for
Following the NCC success, a second release of the software was implemented on 14th July 2008, extending the service to include enhanced security, a mechanism for the deletion of holdings and a validation only routine. The validation only routine serves as a valuable testing tool for both libraries and OCLC developers alike. The service is now ready for further implementations. The second installation will be the Libraries Australia *** service later this year.
The new service has great potential for WorldCat because a growing percentage of contribution to WorldCat is not via WorldCat's online Connexion interface. All systems, of libraries of all types, currently contributing via batch can potentially switch to interactive update. Sending systems need to have
*The NCC contains bibliographic references and the locations of approximately 12 million books and almost 500,000 periodicals in more than 400 libraries in the Netherlands. The NCC was initially loaded to WorldCat in fiscal year 2006.
***Libraries Australia, coordinated by the National Library of Australia, is used for reference, collection development, cataloguing and interlibrary lending. Libraries Australia contains the Australian National Bibliographic Database (ANBD), which records the location details of over 42 million items held in most Australian academic, research, national, state, public and special libraries. The holdings of Libraries Australia became part of WorldCat in fiscal year 2008.