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European Definitions

DIESIS project

The DIESIS project [1] gives the following definition:

HLA (High Level Architecture) is an IEEE standard developed by the United States department of defence [2]. It allows the exchange of information among several and heterogeneous simulators during simulation running. Communications are possible thanks to the RTI (Run Time Interface), which provides a set of services useful for simulations to coordinate their actions and the information exchange. To communicate through the RTI, each simulator must be RTI compliant:

  • By implementing/using a RTI compliant API.
  • By respecting the OMT (Object Model Template) for information (objects, events, etc.) exchange and for specific simulator modelling.
  • By respecting a number of rules concerning communications between simulations and concerning each simulation. The HLA ability can be useful to exchange information between electricity and telecom simulators.

Other International Definitions

United Nations’ Definition

National Definitions

Standard Definition

Discussion Topic

See also


  1. http://www.diesis-project.eu/
  2. 1516.3:2003 IEEE Recommended Practice for High Level Architecture (HLA) Federation Development and Execution Process (FEDEP), 2003.