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The Digital Object Architecture defines three primary components: an identifier system, metadata registries, and digital object repositories. The identifier system is the widely used Handle System and the CNRI metadata registries are now in use in several projects. This paper introduces the Digital Object Repository Server (DORS), the most recent instantiation of CNRI's repository work. DORS includes an open, flexible, secure and scalable protocol and software suite that provides a common interface for interacting directly with all types of Digital Objects. It has been implemented and tested as server software and provides a trustworthy network interface for invoking operations on objects.
