The High Level
Architecture (HLA) developed by the Defense
Modeling and Simulation Office (DMSO) is
addressing the continuing need for
interoperability among new and existing
simulations within the U. S. Department of
Defense. In September 1996 the HLA was approved
as the standard reference architecture for
modeling and simulation in the DoD, and it has
been mandated that all DoD simulations must
become HLA compliant. The HLA consist of three
components: 1) a set of rules that govern certain
characteristics of HLA-compliant simulations, 2)
an object modeling template that describes the
information of common interest to a group (called
a federation) of cooperating federates, and 3) an
interface specification to a Run-Time
Infrastructure (RTI) that provides the software
environment needed by the federates to exchange
information in a coordinated fashion. The RTI can
be viewed as a distributed operating system
providing services to support interoperable
simulations executing in distributed computing
environments.
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