FMI3.xml

<?xml version="1.0" encoding="UTF-8"?>
<fmiModelDescription fmiVersion="3.0-beta.5" modelName="van der Pol oscillator" generationTool="Reference FMUs (development build)" instantiationToken="{8c4e810f-3da3-4a00-8276-176fa3c9f000}">

  <ModelExchange
    modelIdentifier="VanDerPol"
    canGetAndSetFMUState="true"
    canSerializeFMUState="true"/>

  <CoSimulation
    modelIdentifier="VanDerPol"
    canGetAndSetFMUState="true"
    canSerializeFMUState="true"
    canHandleVariableCommunicationStepSize="true"
    providesIntermediateUpdate="true"
    canReturnEarlyAfterIntermediateUpdate="true"
    fixedInternalStepSize="1e-2"/>

  <LogCategories>
    <Category name="logEvents" description="Log events"/>
    <Category name="logStatusError" description="Log error messages"/>
  </LogCategories>

  <DefaultExperiment startTime="0" stopTime="20" stepSize="1e-2"/>

  <ModelVariables>
    <Float64 name="time" valueReference="0" causality="independent" variability="continuous" description="Simulation time"/>
    <Float64 name="x0" valueReference="1" description="the first state" causality="output" variability="continuous" initial="exact" start="2"/>
    <Float64 name="der(x0)" valueReference="2" causality="local" variability="continuous" initial="calculated" derivative="1"/>
    <Float64 name="x1" valueReference="3" description="the second state" causality="output" variability="continuous" initial="exact" start="0"/>
    <Float64 name="der(x1)" valueReference="4" causality="local" variability="continuous" initial="calculated" derivative="3"/>
    <Float64 name="mu" valueReference="5" causality="parameter" variability="fixed" initial="exact" start="1"/>
  </ModelVariables>

  <ModelStructure>
    <Output valueReference="1"/>
    <Output valueReference="3"/>
    <ContinuousStateDerivative valueReference="2"/>
    <ContinuousStateDerivative valueReference="4"/>
    <InitialUnknown valueReference="2"/>
    <InitialUnknown valueReference="4"/>
  </ModelStructure>

</fmiModelDescription>