<!doctype html>
<html>
<head>
  <title>Semantics</title>
</head>

<body>

  <!-- No annotations: the first child is displayed -->
  <p>presentation MathML (no annotations): <math><semantics><mtext>presentation MathML</mtext></semantics></math></p>
  <p>content MathML (no annotations): <math><semantics><csymbol>content MathML</csymbol></semantics></math></p>

  <!-- Presentation MathML: the child is displayed -->
  <p>presentation MathML ; annotation: <math><semantics><mtext>presentation MathML</mtext><annotation>annotation</annotation></semantics></math></p>
  <p>presentation MathML ; annotation-xml: <math><semantics><mtext>presentation MathML</mtext><annotation-xml encoding="application/mathml-presentation+xml"><math><mtext>annotation-xml</mtext></math></annotation-xml></semantics></math></p>

  <!-- Content MathML: the annotation is displayed -->
  <p>content MathML ; annotation: <math><semantics><csymbol>content MathML</csymbol><annotation>annotation</annotation></semantics></math></p>
  <p>content MathML ; annotation-xml: <math><semantics><csymbol>content MathML</csymbol><annotation-xml encoding="application/mathml-presentation+xml"><math><mtext>annotation-xml</mtext></math></annotation-xml></semantics></math></p>

</body>
</html>