We present a highly scalable peer-to-peer distributed system for storage of XML documents. The API to the system is value-oriented (as in functional programming), providing full persistence of document versions and facilitating replication, caching and subdocument sharing without complicated protocols. The paper describes the value-oriented XML store API, gives a brief overview of the implementation, and includes a evaluation of the implementation. The complete documented source code of the system is available online, including our own implementation of the Chord protocol (from MIT) for distributed hash tables.
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