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(Klein,1998). Although HLA was developed for military
use, Klein provides an example for commercial use. The example is of a traffic control
system.
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Two methods are
examined. A static development model
fixes its elements at the beginning of execution. The parameters are either hard coded into
the model or read in from a data source on start-up. In contrast, a dynamic model can have its
elements change during the actual simulation. Past development of traffic flow models
used Monolithic, static techniques.
Future design will utilize the flexibility of HLA for distributed
dynamic simulation.
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Primary information
is used by the core of the model at runtime. It is the variables and the
objects that are the basis of the model.
Secondary information is support information for such items as
animation that are outside the model’s core. Under HLA, formerly static
secondary information can be made dynamic.
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In the example
above, Federate simulations for cards, pedestrians, and traffic lights are
tied together through the HLA Runtime Infrastructure.
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