Building an OAI-based Union Catalog for the National Digital Archives Program in Taiwan

[[abstract]]On January 1st 2002, the National Science Council of Taiwan launched a National Digital Archives Program (NDAP). To share the digital collections of all the archive participants, search via a union interface, and allow the general public access to the collections, it is urgent to build a union catalog of the National Digital Archives. In this article, we define its functions and the system architecture, and explain the problems we encountered in developing the OAI-based union catalog system.