Anatomy of aDORe
The aDORe Archive is a write-once/read-many storage approach for Digital Objects and their constituent datastreams. First, XML-based representations of multiple Digital Objects are concatenated into a single, valid XML file named an XMLtape. Second, ARC files, as introduced by the Internet Archive, are used to contain the constituent datastreams of the Digital Objects. The software was developed by the LANL Digital Library Research & Prototyping Team and is available under GNU LGPL license.
— Ryan Chute Los Alamos National Laboratory, Research Library