<pre class="fragment">
<?xml version="1.0" encoding="UTF-8"?>
<sbml xmlns="http://www.sbml.org/sbml/level3/version1/core" 
      level="3" version="1">
  <model id="My_Model">
    <listOfFunctionDefinitions>
      <functionDefinition> ... </functionDefinition> 
    </listOfFunctionDefinitions>
    <listOfUnitDefinitions>
      <unitDefinition> ... </unitDefinition> 
    </listOfUnitDefinitions>
    <listOfCompartments>
      <compartment> ... </compartment> 
    </listOfCompartments>
    <listOfSpecies>
      <species> ... </species> 
    </listOfSpecies>
    <listOfParameters>
      <parameter> ... </parameter> 
    </listOfParameters>
    <listOfInitialAssignments>
      <initialAssignment> ... </initialAssignment> 
    </listOfInitialAssignments>
    <listOfRules>
      ... elements of subclasses of Rule ...
    </listOfRules>
    <listOfConstraints>
      <constraint> ... </constraint> 
    </listOfConstraints>
    <listOfReactions>
      <reaction> ... </reaction> 
    </listOfReactions>
    <listOfEvents>
      <event> ... </event> 
    </listOfEvents>
  </model>
</sbml>
</pre>
