The Extensible Modeling and Simulation Framework (XMSF) is defined as a composable set of standards, profiles and recommended practices for web-based modeling and simulation. Markup languages based on XML, Internet technologies, and Web services are combining to enable a new generation of distributed M&S applications to emerge, develop and interoperate. The purpose of this task is to develop the technical framework, coordinate with existing public standardization efforts, and demonstrate distributed exemplars of the developed framework. This report describes work accomplished in 2004 by the XMSF project team consisting of Naval Postgraduate School Modeling, Virtual Environments, and Simulation (MOVES) Institute, George Mason University (GMU), Science Applications International Corporation (SAIC), and Old Dominion University/Virginia Modeling, Analysis, and Simulation Center (ODU/VMASC). Principal areas of work included ongoing community education and development activities through conference and workshop participation, liaison with relevant standards organizations, and development of exemplar applications demonstrating the technical approaches and applicable standards relevant to XMSF precepts. The report proposes follow-on efforts for 2005, including continuation of current efforts and further standardization work with multicasting, web-enabled IEEE 1516 Run-Time Infrastructure, data modeling in C2 and M&S systems, and executable architectures.
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