scope:

This document defines the interface between federates (simulations, supporting utilities, or interfaces to live systems) and the underlying software services that support interfederate communication in a distributed simulation domain.

Purpose:

The High Level Architecture (HLA) has been developed to provide a common architecture for distributed modeling and simulation (M&S). To facilitate interfederate communications, HLA federates interact with an underlying software infrastructure. This specification defines the standard services and interfaces to be used by the federates to support efficient information exchange when participating in a distributed federation execution. (A federation execution occurs when sets of federates are brought together to support an objective.)