Key Interoperability Technologies

The High-Level Architecture (HLA) is the leading standard for simulation interoperability. HLA Evolved is the nickname for the HLA IEEE 1516-2010 standard, which builds upon the previous HLA 1516-2000 and HLA 1.3 standards. This page contains information resources for this new standard. The full HLA 1516-2000 standard can be acquired through IEEE at www.ieee.org. The HLA 1516-2010 standard was published in August 2010.

What’s New in HLA Evolved

HLA Evolved contains the same functionality as HLA 1516-2000 but it also adds a number of new features, for example

• Fault tolerance support services
• Web Services (WSDL) support/API
• Modular FOMs
• Smart Update rate reduction
• Encoding helpers
• Extended XML support for FOM/SOM, such as Schemas and extensibility

The following paper gives an overview of the new features in HLA Evolved: "HLA Evolved – A Summary of Major Technical Improvements" (download PDF).

Migrating to HLA Evolved

The following document gives useful migration advice for developers:

• "Migrating a Federate from HLA 1.3 to HLA Evolved" (download PDF). Includes code samples in C++ and Java.

Background Reading

A number of papers about HLA Evolved available on our "Papers" web page. The following documents are recommended starting points:

• "An Overview of the HLA Evolved Modular FOMs" (download PDF) gives an overview of FOM Modules in HLA Evolved
• "Developing Fault Tolerant Federations using HLA Evolved" (download PDF) gives an overview of the fault tolerance features in HLA Evolved and provides some design patterns for fault tolerant federations.
• "A Management Overview of the HLA Evolved Web Service API" (download PDF) gives an overview of the integration of Web Services technology in HLA Evolved.
• "Reducing Integration Time and Risk with the HLA Evolved Encoding Helpers" (download PDF) introduces the new Encoding helpers in C++ and Java.
• "Developing well-balanced federations using the HLA Evolved smart update rate reduction"(download PDF) describes the smart update reduction features and provides sample use cases.
• "Early Experiences from Migrating to the HLA Evolved C++ and Java APIs" (download PDF)

Compatible Products

The following products from Pitch support HLA Evolved:

• Pitch pRTI™ version 4.2 and higher including support for Pitch Booster™
• Pitch Visual OMT™ version 1.6 and higher, version 2.0 and higher recommended
• Pitch Recorder™ version 1.4 and higher
• Pitch Commander™ version 2.2 and higher
• Pitch Developer Studio™ version 2.1 and higher
• Pitch DIS Adapter™ version 2 and higher
• Pitch Google Earth Adapter™ version 1.4 and higher
• Pitch Web Services Connector™ (provides the HLA Evolved Web Services API)