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We are grateful to the Apache Lucene project for the Nutch open source search engine code and to Sun Microsystems for the JXTA open source P2P code.
In addition, software frameworks for developing P2P applications have begun to emerge, including Sun Microsystems' Project JXTA (JXTA, 2003) and the Windows Peer-to-Peer Networking platform from Microsoft (Windows Peer-to-Peer Networking, 2003).
Edutella (Edutella, 2002) is an RDF-based Metadam Infrastructure for P2P Applications based on JXTA. The first application developed by Edutella focuses a P2P network for the exchange of educational resources between German universities (including Hannover, Braunschweig, and Karlsruhe), Swedish universities (including Stockholm and Uppsala), Stanford University, and others.
This has opened the floodgates for platforms like JXTA, Groove and Jabber, which offer highly secure "enterprise information portals" (shared cyberspaces, in other words) that can be customized for each corporation.
VistaView consists of Web-enabled applications such as VistaRepository (JXTA based P2P collaboration and file sharing space), VistaQuery and VistaReport Designers (for data gathering from disparate sources and producing unified reports) and VistaBoard (a visual dashboard providing customized visualization and data analysis of the accessed data sources).
In addition, it has made its JXTA set of protocols, demonstration applications and implementation source code freely available to developers.
They snapshot their P2P architecture built in JXTA platform and describe their semantic integration solution integrating inference rules to convert heterogeneous metadata to local repository.
Before we present the semantic integration solution, we describe the P2P architecture built in JXTA protocol.
The JXTA  (from juxtaposition) project at Sun Microsystems is a research effort to support large-scale P2P infrastructures.
It is a system that supports messaging in a Peer-to-Peer Grid [1,10]; it is a generalized publish-subscribe mechanism; it handles dynamic protocol choice, tunneling through firewalls; it supports TCP, UDP, multicast, SSL and RTP; it can run in client-server mode like JMS (Java Message Service) [15, 17] or in distributed Peer-to-Peer mode like JXTA [5,16]; it can be used in real-time synchronous collaborations like our collaborative PowerPoint applications; it has replaced the JMS in the Anabas system of our implementation handling all collaboration modes.
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- Jxta Abstraction Layer
- JYACC Application Manager