class2.test

<<< mml
<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfrac>
    <mi class="identifiers">x</mi> 
    <mn class="numbers">2</mn> 
  </mfrac> </math>
>>> native
[ EFraction NormalFrac (EIdentifier "x") (ENumber "2") ]