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Open Wonderland is a toolkit for building 3D virtual worlds. The system architecture, based entirely on open standards, is highly modular and designed with a focus on extensibility. In this article, the authors articulate design goals related to collaboration, extensibility, and federation and describe the Open Wonderland architecture, including the design of the server, the client, the communications layer, and the extensibility mechanisms. They also discuss the trade-offs made in implementing the architecture.
Kaplan et al. (Fri,) studied this question.