FMI3.xml

<?xml version="1.0" encoding="UTF-8"?>
<fmiModelDescription
  fmiVersion="3.0"
  modelName="van der Pol oscillator"
  description="This model implements the van der Pol oscillator"
  generationTool="Reference FMUs (development build)"
  instantiationToken="{BD403596-3166-4232-ABC2-132BDF73E644}">

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

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

  <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" dependencies=""/>
    <Output valueReference="3" dependencies=""/>
    <ContinuousStateDerivative valueReference="2" dependencies="3" dependenciesKind="constant"/>
    <ContinuousStateDerivative valueReference="4" dependencies="1 3" dependenciesKind="dependent dependent"/>
    <InitialUnknown valueReference="2" dependencies="3" dependenciesKind="constant"/>
    <InitialUnknown valueReference="4" dependencies="1 3 5" dependenciesKind="dependent dependent dependent"/>
  </ModelStructure>

</fmiModelDescription>