<?xml version="1.0" encoding="UTF-8"?>
<sbml xmlns="http://www.sbml.org/sbml/level2/version4" level="2" version="4">
    <model id="example">
        <listOfUnitDefinitions>
            <unitDefinition id="per_second">
                <listOfUnits>
                    <unit kind="second" exponent="-1"/>
                </listOfUnits>
            </unitDefinition>
        </listOfUnitDefinitions>
        <listOfCompartments>
            <compartment id="C" size="1"/>
        </listOfCompartments>
        <listOfSpecies>
            <species id="S1" compartment="C" initialConcentration="1"/>
            <species id="S2" compartment="C" initialConcentration="0"/>
        </listOfSpecies>
        <listOfRules>
            <algebraicRule>
                <math xmlns="http://www.w3.org/1998/Math/MathML">
                    <apply>
                        <plus/>
                        <ci> S1 </ci>
                        <ci> S2 </ci>
                    </apply>
                </math>
            </algebraicRule>
        </listOfRules>
        <listOfReactions>
            <reaction id="R">
                <listOfReactants>
                    <speciesReference species="S1"/>
                </listOfReactants>
                <listOfProducts>
                    <speciesReference species="S2"/>
                </listOfProducts>
                <kineticLaw>
                    <math xmlns="http://www.w3.org/1998/Math/MathML">
                        <apply>
                            <times/>
                            <ci> C </ci>
                            <ci> k1 </ci>
                            <ci> S1 </ci>
                        </apply>
                    </math>
                    <listOfParameters>
                        <parameter id="k1" value="0.1" units="per_second"/>
                    </listOfParameters>
                </kineticLaw>
            </reaction>
        </listOfReactions>
    </model>
</sbml>
