The aDORe repository architecture is being designed and implemented for ingesting, storing, and accessing a vast collection of Digital Objects at the Research Library. The aDORe architecture is highly modular and standards-based.

An open source version of the aDORe Archive was released May 17, 2006, providing a write-once/read-many storage approach for Digital Objects and their constituent datastreams. The approach combines two interconnected file-based storage mechanisms that are made accessible in a protocol-based manner. First, XML-based representations of multiple Digital Objects are concatenated into a single, valid XML file named an XMLtape. The creation of indexes for both the identifier and the creation datetime of the XML-based representation of the Digital Objects, facilitates OAI-PMH-based access. Second, ARC files, as introduced by the Internet Archive, are used to contain the constituent datastreams of the Digital Objects in a concatenated manner. An index for the identifier of the datastream facilitates OpenURL-based access. The interconnection between an XMLtape and its associated ARC file(s) is provided by conveying the identifiers of these ARC files as administrative information in the XMLtape, and by including OpenURL references to constituent datastreams of a Digital Object in the XML-based representation of that Digital Object stored in the XMLtape.

For more information, see the aDORe Archive website.