<?xml version='1.0'?>

<example>
    <OMOBJ xmlns="http://www.openmath.org/OpenMath" version="2.0" cdbase="http://www.openmath.org/cd">
       <OMA>
          <OMA>
             <OMS cd="calculus1" name="diff"/>
             <OMV name="s"/>
          </OMA>
          <OMV name="t"/>
       </OMA>
    </OMOBJ>
</example>
