The Functional Mock-up Interface (FMI) is a free standard that defines an interface to exchange dynamic models using a combination of XML files, binaries and C code. It’s supported by 230+ tools and maintained as a Modelica Association Project.
Releases and the latest development version of the specification are available on the FMI website.
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docs— sources of the specification document -
headers— header files of the C-API -
schema— XSD schema for the modelDescription.xml -
CONTRIBUTING.adoc — info on contributing to the project and building the specification document
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README.adoc — this document
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main— development of the next release -
v{2|3}.0.x— maintenance of the 2.0 and 3.0 releases
The following layered standards are currently under development.
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XCP — information for calibration and measurement
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Network Communication — mapping of variables to buses
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Structure — semantic grouping of variables
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REF — stimuli and reference results
Code and documentation copyright © 2008-2011 the MODELISAR consortium and 2012-2025 the Modelica Association Project FMI. Code released under the 2-Clause BSD License. Docs released under Attribution-ShareAlike 4.0 International.