As it was originally envisioned and commonly used, theHLA is a mechanism for interconnecting disparatesimulations over a network. Its main application has beendistributed wargaming, where simulations prepared bydifferent organizations are combined in a virtualenvironment for a specific training exercise or studyobjective. The individual simulations are called federatesin the HLA world, while the collection of federates thatinteroperate in the virtual world is called a federation.The HLA specifies both procedures by whichorganizations define a federations, as well as softwareprotocols to which the federates adhere for interoperation.
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