id1

test of id attribute

W3C sample	WIRIS
	$2+x$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mn id="number">2</mn>
  <mo id="operator">+</mo>
  <mi id="identifier">x</mi>
</math>

Author: Design Science, Inc. (D. Doyle, R.Miner)