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Summary

This case study illustrates the use of SVG in a monitor control application for a simplified FMS. It demonstrates the power of SVG for visual models, but more importantly, it demonstrates a method of adding dynamic control to an online monitoring system. With SVG, FMS can easily be extended from a somewhat static report-and-query system to a dynamic loopback control. Admittedly, this example is simplified, and of course, you would not want to trust sensitive controls to the Internet world. However, even if SVG controls are not suitable for real-time heart monitors, innumerable, less critical, functions can fit into this model.

Mobile asset tracking is another area of FMS that can benefit from dynamic updating. For example, it is not difficult to envision an SVG map model capable of tracking shipping containers across a transportation system. The addition of a Java Messaging Service (JMS) to our server can loosely couple a publisher/subscriber pattern to an SVG visual display. The container's GPS unit is the JMS message publisher, and an SVG map servlet is the message subscriber. As units move across the real world, they also move across a map model accessible from any browser. Here, SVG slips across the threshold of dreams, eerily reminiscent of a Jorge Luis Borges novel, a semantic web of referential chains bridging mind and space, convoluting the virtual and real, until all the world is a text of singularly vast lineage.


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