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A new API is being added to the IEEE 1516 HLA standard for simulation interoperability. The new API is based on Web Services, an implementation of the Service Oriented Architecture. This paper provides a brief technical introduction and an overview from a strategic and architectural viewpoint. A Web Service is a service that can be accessed from another(More)
As HLA federations are deployed in more and more distributed environments there is an increasing need to be able to operate in a less than perfect world. A number of extensions that adds fault tolerance support to HLA have been suggested and accepted as a part of HLA Evolved. Two types of faults are introduced: "federate lost" as seen from the federation(More)
Two powerful architectures for interoperability, HLA and SOA (Service Oriented Architectures) have been developed during the past ten years. HLA has been developed within the defense simulation community. SOA has been developed within the commercial enterprise community. At first they may seem quite similar but a closer look reveals fundamental differences(More)
The HLA Federation Object Model (FOM) describes the information that is to be exchanged during the execution of a federation. When the federation execution is created, the RTI loads the FOM. This enables the participating federates to refer to the object model, for example when publishing and subscribing to information. As in many other cases, a monolithic(More)
Today's commercial gaming industry offers a wide range of defense related titles targeted at a consumer mass-market. Several organizations within the Swedish defense have recently studied the opportunities for reusing them in a defense M&S context. Although the technical functionality found in commercial games are already available in high-end defense(More)
A number of extensions for fault tolerance have been developed for the HLA Evolved standard. The new functionality has been accepted during the first HLA Evolved comment round. This paper provides some insights into the development process for these extensions as well as some alternatives that were initially considered. Our initial discussions about adding(More)
Increasing consideration of the concept of sustainability within information technology (IT) organizations and information systems (IS) management has lead to rising challenges regarding the application of existing, non-or partially sustainable IT process models. Although IT reference models exist within the scope of sustainable IS management, the(More)
During test and integration (step 5 in FEDEP), federate developers get together to ensure the technical interoperability of the participating systems. This includes testing if their systems exchange data according to the federation agreements. In HLA 1516, the technical format (encoding) of the data that is exchanged over the RTI is fully specified in the(More)