<figure 
	class="
		formel
		complex_container | simple_container
		child_titel / child_legende
		firstInContainer / lastInContainer 
		firstInSequence / lastInSequence 
		typ1-30">
	<div class="titel">
		<span class="text">Formel-Titel</span>
	</div>
	<math xmlns="http://www.w3.org/1998/Math/MathML">
		....
	</math>
	<figcaption class="legende">
		<p>Formel-Legende</p>
	</figcaption>
</figure>